---
title: "Trilobular Metal Thread-Forming Screws"
description: "Trilobular Metal Thread-Forming Screws to Trade series (trilobular thread-forming screws): full dimensional table. Technical drawing redraws to any row."
url: https://engineeringhardware.com/fastener/trilobular-metal-thread-forming-screws/
source: Engineering Hardware & Fasteners
---

# Trilobular Metal Thread-Forming Screws

Screws · Thread-Forming Screws

2 catalogued sizes, dimensioned to Trade series (trilobular thread-forming screws). Pick any row and the technical drawing redraws to it.

Trilobular Metal Thread-Forming Screws to Trade series (trilobular thread-forming screws): the full dimensional table is reproduced below. 2 sizes are held in the table below, and the technical drawing redraws to whichever row you select.

- **Standard:** Trade series (trilobular thread-forming screws)
- **Catalogued sizes:** 2

Dimensions are nominal values from the governing standard. Confirm the tolerance class for your application before ordering.

![Trilobular Metal Thread-Forming Screws technical product image](https://engineeringhardware.com/wp-content/uploads/2026/09/Trilobular-Metal-Thread-Forming-Screws.webp)

Product catalog

## Related Thread-Forming Screws products

[![Heavy-Duty Waterproof Roof Fixing Screws with Bonded Washers for Roofing Projects](https://img.engineeringhardware.com/Heavy-Duty-Waterproof-Roof-Fixing-Screws-with-Bonded-Washers-for-Roofing-Projects.webp)](https://engineeringhardware.com/product/heavy-duty-waterproof-roof-fixing-screws-with-bonded-washers-for-roofing-projects/)

Self-Tapping & Thread-Forming Screws

### [Heavy-Duty Waterproof Roof Fixing Screws with Bonded Washers for Roofing Projects](https://engineeringhardware.com/product/heavy-duty-waterproof-roof-fixing-screws-with-bonded-washers-for-roofing-projects/)

Self-Tapping Screw, Drywall Screw, Plasterboard Sc · DIN7982, ISO.ANSI…

**US$900.00 – 1,080**MOQ 1 ton

[![Phillips Drive Pan Head with EPDM Washer Partial Thread Self Tapping Painting Color Ral T17 Tapping Chipboard Screw](https://img.engineeringhardware.com/Phillips-Drive-Pan-Head-with-EPDM-Washer-Partial-Thread-Self-Tapping-Painting-Color-Ral-T17-Tapping-Chipboard-Screw.webp)](https://engineeringhardware.com/product/phillips-drive-pan-head-with-epdm-washer-partial-thread-self-tapping-painting-color/)

Self-Tapping & Thread-Forming Screws

### [Phillips Drive Pan Head with EPDM Washer Partial Thread Self Tapping Painting Color Ral T17 Tapping Chipboard Screw](https://engineeringhardware.com/product/phillips-drive-pan-head-with-epdm-washer-partial-thread-self-tapping-painting-color/)

Pan Head · DIN

**Price on request**MOQ 200,000 pieces

[![Phillips Flat Head Screw Wood Self-Tapping Screw Countersunk Cross Full Thread Stainless Steel Self Tapping Screws for Metal](https://img.engineeringhardware.com/Phillips-Flat-Head-Screw-Wood-Self-Tapping-Screw-Countersunk-Cross-Full-Thread-Stainless-Steel-Self-Tapping-Screws-for-Metal.webp)](https://engineeringhardware.com/product/phillips-flat-head-screw-wood-self-tapping-screw-countersunk-cross-full-thread/)

Self-Tapping & Thread-Forming Screws

### [Phillips Flat Head Screw Wood Self-Tapping Screw Countersunk Cross Full Thread Stainless Steel Self Tapping Screws for Metal](https://engineeringhardware.com/product/phillips-flat-head-screw-wood-self-tapping-screw-countersunk-cross-full-thread/)

Countersunk Head · DIN, GB, ANSI, BSW, JIS, GOST

**US$0.012 – 0.06**MOQ 1,000 pieces

[![Zinc Coated Shipping Container Plywood Floorboard Fixed Self Tapping Screws](https://img.engineeringhardware.com/Zinc-Coated-Shipping-Container-Plywood-Floorboard-Fixed-Self-Tapping-Screws.webp)](https://engineeringhardware.com/product/zinc-coated-shipping-container-plywood-floorboard-fixed-self-tapping-screws/)

Self-Tapping & Thread-Forming Screws

### [Zinc Coated Shipping Container Plywood Floorboard Fixed Self Tapping Screws](https://engineeringhardware.com/product/zinc-coated-shipping-container-plywood-floorboard-fixed-self-tapping-screws/)

Container Spare Parts · Steel

**US$0.024 – 0.06**MOQ 1,000 pieces

[![Pan Head Self Tapping Screws Zinc Plated Phillips/Slot/Combination DIN7981](https://img.engineeringhardware.com/Pan-Head-Self-Tapping-Screws-Zinc-Plated-Phillips-Slot-Combination-DIN7981.webp)](https://engineeringhardware.com/product/pan-head-self-tapping-screws-zinc-plated-phillips-slot-combination-din7981/)

Self-Tapping & Thread-Forming Screws

### [Pan Head Self Tapping Screws Zinc Plated Phillips/Slot/Combination DIN7981](https://engineeringhardware.com/product/pan-head-self-tapping-screws-zinc-plated-phillips-slot-combination-din7981/)

Hexagon Socket · DIN, GB, JIS

**US$0.91 – 5,914**MOQ 2,000 pieces

[![#8-32 X 1-1/4″ Zinc Plated Paint Truss Pan Head Self-Tapping Slotted Drawer Knob & Pull Handle Screws Machine Screws for Cabinet](https://img.engineeringhardware.com/8-32-X-1-1-4-Zinc-Plated-Paint-Truss-Pan-Head-Self-Tapping-Slotted-Drawer-Knob-Pull-Handle-Screws-Machine-Screws-for-Cabinet.webp)](https://engineeringhardware.com/product/8-32-x-1-1-4-zinc-plated-paint-truss-pan-head-self-tapping-slotted-drawer-knob-pull/)

Self-Tapping & Thread-Forming Screws

### [#8-32 X 1-1/4″ Zinc Plated Paint Truss Pan Head Self-Tapping Slotted Drawer Knob & Pull Handle Screws Machine Screws for Cabinet](https://engineeringhardware.com/product/8-32-x-1-1-4-zinc-plated-paint-truss-pan-head-self-tapping-slotted-drawer-knob-pull/)

Pan Head · DIN, GB, ANSI, JIS

**US$0.0012 – 0.12**MOQ 1,000 pieces

[View all Self-Tapping & Thread-Forming Screws →](https://engineeringhardware.com/fastener-products/screws/self-tapping-thread-forming-screws/) [Full product catalog](https://engineeringhardware.com/products/)

## 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

Trilobular Metal Thread-Forming Screws are bought for a small number of well-defined jobs. These are the ones we ship them for. Stocked from M1.0 / M1.2 / M1.4 / M1.6 / M2 / M2.5 / M3 / M3.5 / M4 / M5 to M6 / M8 / M10 / M12 / M14 / M16.

### Industries that specify Trilobular Metal Thread-Forming Screws

- **Machine building:** Metric M1–M16 sizes cover small instrument through larger assemblies.
- **Automotive assembly:** Trilobular screws form a thread in drilled or punched holes without a loose nut.
- **Appliance production:** Case-hardened thread-formers suit high-volume sheet and cast-metal assembly.
- **Electrical equipment:** Coatings and profile reduce installation friction in thin metal.
- **Roofing & cladding:** Profiled sheet and rainscreen fixed to purlins and rails.
- **Volume assembly:** Appliance and consumer products driven at speed with power tools.

### Typical applications

- checking the tapered lead and coating for the process
- forming a mating thread as the trilobular screw is driven
- matching pitch and lead to the parent material
- using case-hardened steel for the forming operation
- forming a thread directly in sheet, board or timber
- fixing where there is no access to add a nut behind the panel

### 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 treat a thread-forming screw as a replacement for a pre-tapped machine screw without checking installation torque and parent material.
- 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 Trilobular Metal Thread-Forming Screws are used, how to specify them, and the cases they are wrong for](https://engineeringhardware.com/applications/trilobular-metal-thread-forming-screws/)

## Technical Drawing

Dimensioned line drawing of M1.0 / M1.2 / M1.4 / M1.6 / M2 / M2.5 / M3 / M3.5 / M4 / M5 Trilobular Metal Thread-Forming Screws to Trade series (trilobular thread-forming screws). Side view and top view, drawn to the dimensions in the table below and redrawn for any size selected.

- **Pitch options (mm):** 0.25 / 0.30 / 0.35 / 0.40 / 0.45 / 0.50 / 0.60 / 0.70 / 0.80
- **Profile:** trilobular thread-forming / rolling
- **Material / coating:** case-hardened steel with corrosion-resistant coating
- **Lead form:** four-thread tapered lead

## Dimensions & Specifications (Trade series (trilobular thread-forming screws))

Every row below is a starting point for the customizer above — pick any size and the drawing will redraw to that row.

| Thread size | Pitch options (mm) | Profile | Material / coating | Lead form |
| --- | --- | --- | --- | --- |
| M1.0 / M1.2 / M1.4 / M1.6 / M2 / M2.5 / M3 / M3.5 / M4 / M5 | 0.25 / 0.30 / 0.35 / 0.40 / 0.45 / 0.50 / 0.60 / 0.70 / 0.80 | trilobular thread-forming / rolling | case-hardened steel with corrosion-resistant coating | four-thread tapered lead |
| M6 / M8 / M10 / M12 / M14 / M16 | 1.0 / 1.25 / 1.50 / 1.75 / 2.0 | trilobular thread-forming / rolling | case-hardened steel with corrosion-resistant coating | stabilizing and tapered threads |

Trilobular Metal Thread-Forming Screws (Trade series (trilobular thread-forming screws)) are a type of screws used across industrial assembly. Below is the complete size table together with material, standard and application guidance.

## What Are Trilobular Metal Thread-Forming Screws?

Trilobular Metal Thread-Forming Screws are screws defined by Trade series (trilobular thread-forming screws). They are selected by thread size and the dimensional characteristics shown below, and are available in a range of materials and finishes to suit the application and environment.

## Materials & Finishes

Common materials include carbon steel (typically zinc plated or hot-dip galvanized), hardened or case-hardened steel where wear matters, and stainless steel A2 (304) or A4 (316) for corrosion resistance. Specify the material, hardness where relevant, and the surface finish appropriate to your application and environment.

## Specification Guides

Each size, material and standard of Trilobular Metal Thread-Forming Screws has its own reference page with the figures for that one configuration.

## Goes With

Hardware commonly specified alongside Trilobular Metal Thread-Forming Screws.

## Pricing

Trilobular Metal Thread-Forming Screws are supplied to order. Pricing starts from approximately US$0.050 per piece for standard sizes in case-hardened steel, zinc plated; final pricing depends on size, material, finish and order quantity (MOQ applies). Submit your exact configuration with the quote form above.

Custom manufacturing · Made to drawing

## Need a trilobular metal thread-forming screws outside the standard range?

A non-standard screw is quoted from the drawing; where one already exists in the catalog, the special is usually a variation on its tooling. Made by cold heading or warm forging.

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

[Custom screw manufacturing](https://engineeringhardware.com/custom/screws/)[Send a drawing](https://engineeringhardware.com/custom/screws/#rfq)

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](https://engineeringhardware.com/wp-content/uploads/2026/08/09-wire-rod-feed-cold-heading-machine.webp) 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](https://engineeringhardware.com/wp-content/uploads/2026/08/03-thread-rolling-machine-bolt-production.webp) 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](https://engineeringhardware.com/wp-content/uploads/2026/08/05-heat-treatment-baskets-black-bolts.webp) 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](https://engineeringhardware.com/wp-content/uploads/2026/08/23-zinc-plated-bolts-treatment-basket.webp) 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

### What is the controlling standard for Trilobular Metal Thread-Forming Screws?

Trilobular Metal Thread-Forming Screws are manufactured to Trade series (trilobular thread-forming screws). The dimensional values on this page follow that standard.

### Which sizes of Trilobular Metal Thread-Forming Screws does Engineering Hardware supply?

The table on this page lists 2 sizes for Trilobular Metal Thread-Forming Screws, ranging from M1.0 / M1.2 / M1.4 / M1.6 / M2 / M2.5 / M3 / M3.5 / M4 / M5 to M6 / M8 / M10 / M12 / M14 / M16. Sizes outside the table can be quoted on request.

### In which materials are Trilobular Metal Thread-Forming Screws supplied?

Trilobular Metal Thread-Forming Screws are supplied in alloy steel (typically 10.9 / 12.9 for socket screws), carbon steel and stainless A2 / A4, with finishes including zinc plating, hot-dip galvanizing and black oxide. Choose material and finish to suit the load and the service environment for Trilobular Metal Thread-Forming Screws.

### How do I request a quotation?

Use the parametric drawing on this page to set the exact configuration (size, material, finish) and click "Request this configuration" — a specialist from Engineering Hardware will respond within one business day.