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Screws · WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453

A4 (316) Stainless Steel Self-Tapping Screws, WN 14xx Series

Mechanical properties, corrosion behaviour and the full dimensional range for this grade.

A4 Stainless Steel Self-Tapping Screws, WN 14xx Series are supplied to ISO 3506 group A4 (316 / 1.4401), commonly supplied A4-80. Corrosion behaviour is superior, including marine and chloride environments, the material is largely non-magnetic, and the usable service range is approx. -200 °C to +400 °C, subject to the property class and the joint. In practice this grade is specified for marine, coastal and chemical applications.

Grade
ISO 3506 group A4 (316 / 1.4401), commonly supplied A4-80
Corrosion resistance
Superior, including marine and chloride environments
Magnetic response
Largely non-magnetic
Service temperature
approx. -200 °C to +400 °C, subject to the property class and the joint

Property values are typical for the grade. Certified mechanical test data is available on request for production orders.

A4 (316) Stainless Steel Self-Tapping Screws, WN 14xx Series reference image

A4 Stainless Steel Self-Tapping Screws, WN 14xx Series are supplied to WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453. The grade provides superior, including marine and chloride environments and is largely non-magnetic; the practical service range is approx. -200 °C to +400 °C, subject to the property class and the joint. Property data, grade comparison and the full size table follow.

Why Choose A4 Stainless Steel for Self-Tapping Screws, WN 14xx Series

Specified for marine, coastal and chemical applications. For self-tapping screws, wn 14xx series, this matters when superior, including marine and chloride environments is the primary requirement.

Mechanical & Physical Properties

Grade designationISO 3506 group A4 (316 / 1.4401), commonly supplied A4-80
Magnetic responseLargely non-magnetic
Service temperatureapprox. -200 °C to +400 °C, subject to the property class and the joint
Corrosion characteristicSuperior, including marine and chloride environments

Corrosion Behavior in Service

A4 (316) adds 2–3% molybdenum to the A2 (304) composition, which dramatically improves resistance to chloride-pitting corrosion. For Self-Tapping Screws, WN 14xx Series in marine, coastal, swimming-pool or food-processing environments, A4 is the default selection.

Galvanic & Galling Considerations

Two important notes for stainless self-tapping screws, wn 14xx series: (1) stainless can gall on stainless threads under load — use a thread lubricant or anti-galling compound, especially for M6 and below; (2) when joined to aluminum or galvanized steel, stainless can drive galvanic corrosion of the less-noble metal in wet service — isolate with a coating or sleeve where appropriate.

Using Stainless Fasteners in Aluminum

Stainless steel is more noble than aluminum, so with an electrolyte present — rain, condensation, salt spray — the aluminum becomes the anode and corrodes at the joint. Area ratio decides how bad it gets: a small stainless fastener in a large aluminum section is normally acceptable, a large stainless fastener in thin aluminum is not. Where the joint gets wet, isolate the metals with a coated or nylon washer and a sealant, or specify an aluminum or coated fastener instead.

Sizes of Self-Tapping Screws, WN 14xx Series Available in A4 Stainless Steel

SizeTypePitch P (mm)d2 (mm)Length range l (mm)Reference standard
K30Hexalobular socket flanged head self tapping screws1.341.666~30WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K30Hexalobular socket pan head self tapping screws1.341.666~30WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K30Hexalobular socket raised countersunk head self tapping screws1.341.666~30WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K30Hexalobular socket flat countersunk head self tapping screws1.341.666~30WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K30Hex head self tapping screws1.341.666~30WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K30Flanged hex head self tapping screws1.341.666~30WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K35Hexalobular socket flanged head self tapping screws1.571.917~35WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K35Hexalobular socket pan head self tapping screws1.571.917~35WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K35Hexalobular socket raised countersunk head self tapping screws1.571.917~35WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K35Hexalobular socket flat countersunk head self tapping screws1.571.917~35WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K35Hex head self tapping screws1.571.917~35WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K35Flanged hex head self tapping screws1.571.917~35WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K40Hexalobular socket flanged head self tapping screws1.792.178~40WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K40Hexalobular socket pan head self tapping screws1.792.178~40WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K40Hexalobular socket raised countersunk head self tapping screws1.792.178~40WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K40Hexalobular socket flat countersunk head self tapping screws1.792.178~40WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K40Hex head self tapping screws1.792.178~40WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K40Flanged hex head self tapping screws1.792.178~40WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K50Hexalobular socket flanged head self tapping screws2.242.688~50WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K50Hexalobular socket pan head self tapping screws2.242.688~50WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K50Hexalobular socket raised countersunk head self tapping screws2.242.688~50WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K50Hexalobular socket flat countersunk head self tapping screws2.242.688~50WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K50Hex head self tapping screws2.242.688~50WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K50Flanged hex head self tapping screws2.242.688~50WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K60Hexalobular socket flanged head self tapping screws2.693.1912~60WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K60Hexalobular socket pan head self tapping screws2.693.1912~60WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K60Hexalobular socket raised countersunk head self tapping screws2.693.1912~60WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K60Hexalobular socket flat countersunk head self tapping screws2.693.1912~60WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K60Hex head self tapping screws2.693.1912~60WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K60Flanged hex head self tapping screws2.693.1912~60WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453

Dimensions are independent of the material: every size above is available in A4 Stainless Steel.

Custom manufacturing · Made to drawing

Need this screw in a grade that is not listed?

A4 Stainless Steel is one of the grades the catalog describes. Dimensions, material, finish and form are specified from the drawing — a screw outside the standard range is a variation on existing tooling rather than a new design. Made by cold heading or warm forging.

Minimum order from 2,000 pieces; samples within 7 days of drawing approval.

Custom screw manufacturingSend a drawing

Technical Drawing

Customize the parameters below — every spec field is editable, and the drawing redraws to match the values you choose. Changing the size will snap the other fields to that size's standard values; you can then override any individual value.

Dimensioned line drawing of K30 Self-Tapping Screws, WN 14xx Series to WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453. Side view and top view, drawn to the dimensions in the table below and redrawn for any size selected.
Type
Hexalobular socket flanged head self tapping screws
Pitch P (mm)
1.34
d2 (mm)
1.66
Length range l (mm)
6~30
Sends the selected values to the quote form below.

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The form below follows the current technical drawing configuration. Change the drawing values above and the request details update automatically.

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Specification
Business Information

Dimensions & Specifications (WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453)

SizeTypePitch P (mm)d2 (mm)Length range l (mm)Reference standard
K30Hexalobular socket flanged head self tapping screws1.341.666~30WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K30Hexalobular socket pan head self tapping screws1.341.666~30WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K30Hexalobular socket raised countersunk head self tapping screws1.341.666~30WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K30Hexalobular socket flat countersunk head self tapping screws1.341.666~30WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K30Hex head self tapping screws1.341.666~30WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K30Flanged hex head self tapping screws1.341.666~30WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K35Hexalobular socket flanged head self tapping screws1.571.917~35WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K35Hexalobular socket pan head self tapping screws1.571.917~35WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K35Hexalobular socket raised countersunk head self tapping screws1.571.917~35WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K35Hexalobular socket flat countersunk head self tapping screws1.571.917~35WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K35Hex head self tapping screws1.571.917~35WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K35Flanged hex head self tapping screws1.571.917~35WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K40Hexalobular socket flanged head self tapping screws1.792.178~40WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K40Hexalobular socket pan head self tapping screws1.792.178~40WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K40Hexalobular socket raised countersunk head self tapping screws1.792.178~40WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K40Hexalobular socket flat countersunk head self tapping screws1.792.178~40WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K40Hex head self tapping screws1.792.178~40WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K40Flanged hex head self tapping screws1.792.178~40WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K50Hexalobular socket flanged head self tapping screws2.242.688~50WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K50Hexalobular socket pan head self tapping screws2.242.688~50WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K50Hexalobular socket raised countersunk head self tapping screws2.242.688~50WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K50Hexalobular socket flat countersunk head self tapping screws2.242.688~50WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K50Hex head self tapping screws2.242.688~50WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K50Flanged hex head self tapping screws2.242.688~50WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K60Hexalobular socket flanged head self tapping screws2.693.1912~60WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K60Hexalobular socket pan head self tapping screws2.693.1912~60WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K60Hexalobular socket raised countersunk head self tapping screws2.693.1912~60WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K60Hexalobular socket flat countersunk head self tapping screws2.693.1912~60WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K60Hex head self tapping screws2.693.1912~60WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K60Flanged hex head self tapping screws2.693.1912~60WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K70Hexalobular socket flanged head self tapping screws3.143.714~70WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K70Hexalobular socket pan head self tapping screws3.143.714~70WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K70Hexalobular socket raised countersunk head self tapping screws3.143.714~70WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K70Hexalobular socket flat countersunk head self tapping screws3.143.714~70WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K70Hex head self tapping screws3.143.714~70WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K70Flanged hex head self tapping screws3.143.714~70WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K80Hexalobular socket flanged head self tapping screws3.594.2116~80WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K80Hexalobular socket pan head self tapping screws3.594.2116~80WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K80Hexalobular socket raised countersunk head self tapping screws3.594.2116~80WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K80Hexalobular socket flat countersunk head self tapping screws3.594.2116~80WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K80Hex head self tapping screws3.594.2116~80WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K80Flanged hex head self tapping screws3.594.2116~80WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K100Hexalobular socket flanged head self tapping screws4.495.2320~100WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K100Hexalobular socket pan head self tapping screws4.495.2320~100WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K100Hexalobular socket raised countersunk head self tapping screws4.495.2320~100WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K100Hexalobular socket flat countersunk head self tapping screws4.495.2320~100WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K100Hex head self tapping screws4.495.2320~100WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K100Flanged hex head self tapping screws4.495.2320~100WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K30H cross flanged head self tapping screws1.341.666~30WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K30H cross pan head self tapping screws1.341.666~30WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K30H cross flat countersunk head self tapping screws1.341.666~30WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K35H cross flanged head self tapping screws1.571.917~35WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K35H cross pan head self tapping screws1.571.917~35WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K35H cross flat countersunk head self tapping screws1.571.917~35WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K40H cross flanged head self tapping screws1.792.178~40WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K40H cross pan head self tapping screws1.792.178~40WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K40H cross flat countersunk head self tapping screws1.792.178~40WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K50H cross flanged head self tapping screws2.242.688~50WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K50H cross pan head self tapping screws2.242.688~50WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K50H cross flat countersunk head self tapping screws2.242.688~50WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K60H cross flanged head self tapping screws2.693.1912~60WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K60H cross pan head self tapping screws2.693.1912~60WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K60H cross flat countersunk head self tapping screws2.693.1912~60WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K70H cross flanged head self tapping screws3.143.714~70WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K70H cross pan head self tapping screws3.143.714~70WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453
K70H cross flat countersunk head self tapping screws3.143.714~70WN 1411 / WN 1412 / WN 1413 / WN 1423 / WN 1446 / WN 1447 / WN 1451 / WN 1452 / WN 1453

Materials & Grades

Select a material class to see the grades we supply it in. Each designation is listed with its ISO/EN, AISI/SAE, JIS and GB equivalents.

Stainless Steel38 Carbon Steel66 Alloy Steel41 Bearing Steel5 Spring Steel25 Aluminum and Aluminum Alloys21 Brass17 Bronze11 Copper8 Titanium and Titanium Alloys18 Nickel and Nickel Alloys22 Iron-Nickel and High-Temperature Alloys10 Tool Steel and Specialty Hardened Steel9 Structural and Construction Steel9

Stainless Steel

Austenitic Stainless Steel

  • A1 AISI 303 · SAE 303 · SUS303 · EN 1.4305 · X8CrNiS18-9
  • A2 AISI 304 · SAE 304 · SUS304 · EN 1.4301 · X5CrNi18-10 · 06Cr19Ni10
  • 304L AISI 304L · SUS304L · EN 1.4307 · X2CrNi18-9 · 022Cr19Ni10
  • 302 AISI 302 · SUS302 · EN 1.4310
  • 305 AISI 305 · SUS305 · EN 1.4303
  • A4 AISI 316 · SAE 316 · SUS316 · EN 1.4401 · X5CrNiMo17-12-2 · 06Cr17Ni12Mo2
  • 316L AISI 316L · SUS316L · EN 1.4404 · X2CrNiMo17-12-2 · 022Cr17Ni12Mo2
  • 321 AISI 321 · SUS321 · EN 1.4541 · X6CrNiTi18-10
  • 310 / 310S AISI 310 · AISI 310S · SUS310S · EN 1.4845
  • 302HQ AISI 302HQ
  • A3
  • A5
  • 347 AISI 347 · SUS347 · EN 1.4550 · X6CrNiNb18-10
  • 309 / 309S AISI 309 · AISI 309S · SUS309S

Martensitic Stainless Steel

  • AISI 410 SUS410 · EN 1.4006 · X12Cr13 · 12Cr13
  • AISI 420 SUS420J1 · SUS420J2 · EN 1.4021 · EN 1.4028 · 20Cr13 · 30Cr13
  • AISI 431 SUS431 · EN 1.4057 · X17CrNi16-2
  • C1
  • C3
  • C4
  • AISI 440A
  • AISI 440B
  • AISI 440C SUS440C · EN 1.4125

Ferritic Stainless Steel

  • AISI 430 SUS430 · EN 1.4016 · X6Cr17 · 10Cr17
  • F1
  • AISI 434
  • AISI 444

Precipitation-Hardening Stainless Steel

  • 17-4 PH AISI 630 · UNS S17400 · SUS630 · EN 1.4542 · X5CrNiCuNb16-4
  • 15-5 PH UNS S15500
  • 17-7 PH UNS S17700

Duplex and Super Duplex Stainless Steel

  • Duplex 2205 UNS S31803 · UNS S32205 · EN 1.4462
  • Super Duplex 2507 UNS S32750 · EN 1.4410
  • D2
  • D4
  • D6
  • D8
  • Lean Duplex 2101 UNS S32101
  • Super Duplex S32760 UNS S32760 · EN 1.4501

Carbon Steel

Low-Carbon Steel

  • SAE 1006
  • SAE 1008
  • SAE 1010
  • SAE 1018
  • SAE 1020
  • Q195
  • Q235
  • SAE 1012
  • SAE 1015
  • Q215
  • ML08
  • ML08Al
  • ML10
  • ML15
  • ML20
  • SWRCH6A
  • SWRCH8A
  • SWRCH10A
  • SWRCH12A
  • SWRCH15A
  • SWRCH18A

Medium-Carbon Steel

  • SAE 1035
  • SAE 1045
  • S45C
  • C45
  • SAE 1030
  • SAE 1040
  • SAE 1050
  • 30
  • 35
  • 40
  • 45
  • 50
  • S35C
  • S40C
  • S50C
  • C35
  • C40

High-Carbon Steel

  • SAE 1060
  • SAE 1070
  • 65Mn
  • SAE 1065
  • SAE 1075
  • SAE 1080
  • SAE 1085
  • SAE 1090
  • SAE 1095
  • 60
  • 65
  • 70
  • 75
  • 80
  • 85

Cold-Heading Steel

  • SWRCH22A
  • 10B21
  • SWRCH22K
  • SWRCH25K
  • SWRCH30K
  • SWRCH35K
  • SWRCH40K
  • ML20Mn
  • ML25
  • ML30
  • ML35
  • ML40
  • 15B25

Alloy Steel

Chromium Steel

  • 40Cr
  • 45Cr
  • AISI 5140
  • SAE 5140
  • AISI 5120
  • SAE 5120
  • SCr420
  • SCr440

Chromium-Molybdenum Steel

  • 35CrMo
  • 42CrMo
  • AISI 4140
  • SCM435
  • SCM440
  • 42CrMo4
  • 30CrMo
  • AISI 4130
  • SAE 4130
  • SAE 4140
  • AISI 4142
  • AISI 4145
  • SCM415
  • SCM420
  • SCM445
  • EN 1.7220
  • EN 1.7225
  • 25CrMo4
  • 34CrMo4

Nickel-Chromium-Molybdenum Steel

  • AISI 4340
  • SAE 4340
  • 40CrNiMo
  • SNCM439
  • EN 1.6511
  • 36CrNiMo4

Boron Alloy Steel

  • 10B22
  • 10B21
  • 15B21
  • 15B25
  • 20MnTiB
  • 20Mn2B
  • 35VB
  • 40MnB

Bearing Steel

Bearing Steel

  • GCr15
  • AISI 52100 SAE 52100 · UNS G52986
  • SUJ2
  • 100Cr6 EN 1.3505
  • GCr15SiMn

Spring Steel

Carbon Spring Steel

  • SAE 1065
  • SAE 1070
  • SAE 1075
  • SAE 1080
  • SAE 1095
  • 65
  • 70
  • 75
  • 80
  • 65Mn

Silicon-Manganese Spring Steel

  • 60Si2Mn
  • 60Si2MnA
  • SUP6
  • SUP7

Chromium-Vanadium Spring Steel

  • 50CrVA
  • SAE 6150
  • AISI 6150
  • SUP10

Stainless Spring Steel

  • AISI 301
  • SUS301
  • EN 1.4310
  • AISI 302
  • AISI 304
  • AISI 316
  • 17-7 PH

Aluminum and Aluminum Alloys

Commercially Pure Aluminum

  • 1050
  • 1060
  • 1070
  • 1100

2xxx Series Aluminum

  • 2024
  • 2011
  • 2014
  • 2017

5xxx Series Aluminum

  • 5052
  • 5083
  • 5754

6xxx Series Aluminum

  • 6061
  • 6061-T6
  • 6063
  • 6082
  • 6082-T6

7xxx Series Aluminum

  • 7075
  • 7075-T6
  • 7005
  • 7050
  • 7075-T73

Brass

Free-Cutting Brass

  • C36000
  • H62
  • HPb59-1
  • C3601
  • C3602
  • C3604
  • CuZn36Pb3
  • CuZn39Pb3
  • EN CW614N
  • EN CW617N
  • H65

Lead-Free Brass

  • C69300
  • C27450
  • CW510L
  • CW511L

Naval Brass

  • C46400
  • CuZn39Sn1

Bronze

Silicon Bronze

  • C65500
  • C65100
  • C65600

Phosphor Bronze

  • C51000
  • C52100
  • CuSn6
  • CuSn8

Aluminum Bronze

  • C95400
  • C95500
  • C63000
  • CuAl10Ni5Fe4

Copper

Copper

  • C11000
  • T2
  • C10100
  • C10200
  • C12200
  • T1
  • TU1
  • TU2

Titanium and Titanium Alloys

Commercially Pure Titanium

  • Grade 2
  • Grade 1
  • Grade 3
  • Grade 4
  • TA1
  • TA2
  • TA3

Alpha-Beta Titanium Alloys

  • Grade 5
  • Ti-6Al-4V
  • TC4
  • UNS R56400

Low-Interstitial Grade

  • Grade 23
  • Ti-6Al-4V ELI
  • UNS R56407

Other Titanium Fastener Alloys

  • Ti-6Al-6V-2Sn
  • Ti-6Al-2Sn-4Zr-2Mo
  • Beta-C titanium
  • Ti-10V-2Fe-3Al

Nickel and Nickel Alloys

Commercially Pure Nickel

  • Nickel 200
  • UNS N02200
  • Nickel 201
  • UNS N02201

Inconel Alloys

  • Inconel 625 UNS N06625
  • Inconel 718 UNS N07718
  • Inconel 600 UNS N06600
  • Inconel 601 UNS N06601
  • Inconel 686 UNS N06686
  • Inconel X-750 UNS N07750

Monel Alloys

  • Monel 400 UNS N04400
  • Monel K-500 UNS N05500

Hastelloy Alloys

  • Hastelloy C-276 UNS N10276
  • Hastelloy C-22 UNS N06022
  • Hastelloy B-2 UNS N10665
  • Hastelloy B-3 UNS N10675
  • Hastelloy X UNS N06002

Other Nickel Alloys

  • Alloy 20 UNS N08020
  • Alloy 625
  • Alloy 718
  • Alloy 825 UNS N08825
  • Alloy 925 UNS N09925

Iron-Nickel and High-Temperature Alloys

A286

  • A-286
  • UNS S66286
  • EN 1.4980

Invar

  • Invar 36
  • Alloy 36
  • UNS K93600
  • FeNi36

Alloy 42

  • Alloy 42
  • UNS K94100
  • FeNi42

Tool Steel and Specialty Hardened Steel

Tool Steel and Specialty Hardened Steel

  • AISI D2
  • AISI H13
  • SKD11
  • Cr12MoV
  • AISI O1
  • AISI A2
  • AISI S7
  • SKD61
  • 9CrSi

Structural and Construction Steel

Structural and Construction Steel

  • ASTM A36
  • Q235B
  • Q355B
  • S355JR
  • Q235C
  • Q355C
  • S235JR
  • S275JR
  • S355J2

Applications & Industries

Where Self-Tapping Screws are used, and what decides the specification in each case. Stocked from K30 to K70 (screw size).

Industries that specify Self-Tapping Screws

  • Electronics housings plastic bosses.
  • Automotive interiors plastic trim.
  • Appliances housings.
  • Consumer goods plastic parts.
  • Joinery & furniture Hardware, hinges and fittings into solid timber and wood-based board.
  • Roofing & cladding Profiled sheet and rainscreen fixed to purlins and rails.

Typical applications

  • forming threads in plastic
  • choosing head style
  • avoiding inserts
  • reducing parts
  • high-volume driving with a bit and a clutch-set driver
  • forming a thread directly in sheet, board or timber

Service conditions to specify against

Marine and coastal
Available in A4 (316) stainless for chloride exposure — coastal structures, pool halls, water treatment and deck hardware, where A2 will eventually pit.
Pilot hole
Selection is really a hole-size decision: too small and the screw snaps or splits the material, too large and it strips. The size is stated per row.

Where to use something else

  • Do not use metal self-tappers in plastic; they crack the boss.
  • Not for a joint that will be dismantled and reassembled repeatedly in the same hole — use an insert or a rivet nut instead.

Full application guide: where Self-Tapping Screws are used, how to specify them, and the cases they are wrong for

Inside the plant

Manufactured in our own plant

This part is cold-formed, threaded, heat-treated and finished in-house. The stages below are where its class and finish are actually decided.

  1. Wire rod feeding into a cold heading machine
    01

    Cold heading

    Wire rod is drawn to size and cold-formed into blanks. Forming rather than cutting keeps the grain flow continuous around the head, which is where a bolt is most likely to fail.

    Head dimensions and under-head radius checked at set-up and per shift.

  2. Thread rolling machine producing bolt threads
    02

    Thread rolling

    Threads are rolled between hardened dies rather than cut. Rolled threads are stronger in fatigue than cut threads and hold pitch and flank angle far more consistently across a batch.

    Go / no-go ring gauges to ISO 965 tolerance class 6g.

  3. Baskets of bolts staged for heat treatment
    03

    Heat treatment

    Quench-and-temper brings carbon and alloy steel to the property class ordered — 8.8, 10.9 or 12.9 — with the furnace charge tracked so a finished lot can be traced back to it.

    Core hardness and tensile tested per lot to ISO 898-1.

  4. Zinc plated bolts in a treatment basket
    04

    Surface treatment

    Zinc, zinc-nickel, hot-dip galvanizing, black oxide, phosphate and Dacromet, selected against the service environment rather than against the price list.

    Coating thickness and neutral salt spray hours to ISO 9227.

Frequently Asked Questions

Can A4 Stainless Steel Self-Tapping Screws, WN 14xx Series be used with aluminum?

Yes, but stainless drives mild galvanic corrosion of aluminum in wet service — isolate with a coating, sleeve or paint, or accept the trade-off if the joint is dry and indoor.

What's the service temperature limit for A4 Stainless Steel?

The practical service range is approx. -200 °C to +400 °C, subject to the property class and the joint.

Can A4 Stainless Steel replace plated alloy steel structurally?

Only at the standard strength classes — A2-70 / A4-80 are roughly equivalent to class 7 steel; A4-100 reaches class 8.8. For class 10.9 or 12.9 strength, plated alloy steel is required.

Are A4 Stainless Steel Self-Tapping Screws, WN 14xx Series magnetic?

A4 Stainless Steel Self-Tapping Screws, WN 14xx Series are largely non-magnetic.

How do I request a quotation?

Use the technical drawing on this page to pick the exact configuration, then submit it with the quote form. We respond within one business day.