Mechanical properties, corrosion behaviour and the full dimensional range for this grade.
A4 Stainless Steel Turnbuckle 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.
Hidden Deck Fasteners Sourcing: Manufacturing, Types & Material Compatibility
A4 Stainless Steel is not a material turnbuckle are supplied in. Turnbuckle are threaded fasteners, and this combination does not describe a part that exists.
Need this rigging hardware in a grade that is not listed?
A4 Stainless Steel is one of the grades the catalog describes. A non-standard rigging hardware is quoted from the drawing; where one already exists in the catalog, the special is usually a variation on its tooling. Made by hot forging.
Minimum order from 2,000 pieces; samples within 7 days of drawing approval.
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 M6 Turnbuckle — ISO / DIN (Series 156). Side view and top view, drawn to the dimensions in the table below and redrawn for any size selected.
Total length closed (mm)
105
Take-up length (mm)
75
Working load limit (kg)
80
Material
Drop-forged steel, hot-dip galvanized
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Click “Request this configuration” under the drawing to confirm the exact specification, then add your contact details. You can also send the request without a specification — but only an accurate selection gets an accurate quote.
Dimensions & Specifications (ISO / DIN)
Thread size
Total length closed (mm)
Take-up length (mm)
Working load limit (kg)
Material
Reference standard
M6
105
75
80
Drop-forged steel, hot-dip galvanized
DIN 1480 / GB/T 5973
M8
125
90
140
Drop-forged steel, hot-dip galvanized
DIN 1480 / GB/T 5973
M10
150
110
230
Drop-forged steel, hot-dip galvanized
DIN 1480 / GB/T 5973
M12
180
135
340
Drop-forged steel, hot-dip galvanized
DIN 1480 / GB/T 5973
M16
230
170
700
Drop-forged steel, hot-dip galvanized
DIN 1480 / GB/T 5973
M20
290
215
1200
Drop-forged steel, hot-dip galvanized
DIN 1480 / GB/T 5973
M24
355
260
1800
Drop-forged steel, hot-dip galvanized
DIN 1480 / GB/T 5973
M30
420
320
3200
Drop-forged steel, hot-dip galvanized
DIN 1480 / GB/T 5973
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.
Third-party video, selected automatically for this topic. It is not produced by Engineering Hardware and is not a specification source — use the tables on this page for dimensional data.
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.
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.
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.
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.
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 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 Turnbuckle — ISO / DIN (Series 156) magnetic?
A4 Stainless Steel Turnbuckle — ISO / DIN (Series 156) are largely non-magnetic.
What corrosion resistance do A4 Stainless Steel Turnbuckle — ISO / DIN (Series 156) offer?
A4 Stainless Steel Turnbuckle — ISO / DIN (Series 156) provide superior, including marine and chloride environments with a service range of approx. -200 °C to +400 °C, subject to the property class and the joint.
Should I choose A4 Stainless Steel or A2 (304) for Turnbuckle — ISO / DIN (Series 156)?
For Turnbuckle — ISO / DIN (Series 156), A4 Stainless Steel suits general indoor and outdoor use; A2 (304) is preferred for marine, coastal and chemical environments. Choose by corrosion exposure first.
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.
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