---
title: "Concealed-Head Self-Clinching Studs and Standoffs"
description: "Concealed-Head Self-Clinching Studs and Standoffs to Trade series (concealed-head clinch hardware): sizes M3 to M6. Technical drawing redraws to any row."
url: https://engineeringhardware.com/fastener/concealed-head-self-clinching-studs-and-standoffs/
source: Engineering Hardware & Fasteners
---

# Concealed-Head Self-Clinching Studs and Standoffs

Nuts · Concealed Head Self Clinching

4 catalogued sizes, dimensioned to Trade series (concealed-head clinch hardware). Pick any row and the technical drawing redraws to it.

Concealed-Head Self-Clinching Studs and Standoffs to Trade series (concealed-head clinch hardware) are catalogued in sizes M3 to M6. 4 sizes are held in the table below, and the technical drawing redraws to whichever row you select.

- **Standard:** Trade series (concealed-head clinch hardware)
- **Size range:** M3-M6
- **Catalogued sizes:** 4

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

![Concealed-Head Self-Clinching Studs and Standoffs technical product image](https://engineeringhardware.com/wp-content/uploads/2026/09/PEM-Concealed-Head-Self-Clinching-Studs-and-Standoffs.webp)

Product catalog

## Related Concealed Head Self Clinching products

[![M5 Self Clinching Nut Pem Type Steel Press Fit Nut](https://img.engineeringhardware.com/M5-Self-Clinching-Nut-Pem-Type-Steel-Press-Fit-Nut.webp)](https://engineeringhardware.com/product/m5-self-clinching-nut-pem-type-steel-press-fit-nut/)

Self-Clinching, Press-Fit & Swage Fasteners

### [M5 Self Clinching Nut Pem Type Steel Press Fit Nut](https://engineeringhardware.com/product/m5-self-clinching-nut-pem-type-steel-press-fit-nut/)

Round Head · DIN, ANSI, GB, JIS

**US$0.06 – 0.12**MOQ 10,000 pieces

[![Stainless Steel 304 Self Clinch Nut Press M2 M3 M4 M5 M6 M8 M10 Clinching Nut Zinc Plated Self-Clinching](https://img.engineeringhardware.com/Stainless-Steel-304-Self-Clinch-Nut-Press-M2-M3-M4-M5-M6-M8-M10-Clinching-Nut-Zinc-Plated-Self-Clinching-2.webp)](https://engineeringhardware.com/product/stainless-steel-304-self-clinch-nut-press-m2-m3-m4-m5-m6-m8-m10-clinching-nut-zinc-2/)

Self-Clinching, Press-Fit & Swage Fasteners

### [Stainless Steel 304 Self Clinch Nut Press M2 M3 M4 M5 M6 M8 M10 Clinching Nut Zinc Plated Self-Clinching](https://engineeringhardware.com/product/stainless-steel-304-self-clinch-nut-press-m2-m3-m4-m5-m6-m8-m10-clinching-nut-zinc-2/)

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

**US$0.012 – 6.79**MOQ 100 pieces

[![Stainless Steel Self Clinching Standoff Nut Stud Pin for Sheet Metal](https://img.engineeringhardware.com/Stainless-Steel-Self-Clinching-Standoff-Nut-Stud-Pin-for-Sheet-Metal.webp)](https://engineeringhardware.com/product/stainless-steel-self-clinching-standoff-nut-stud-pin-for-sheet-metal/)

Self-Clinching, Press-Fit & Swage Fasteners

### [Stainless Steel Self Clinching Standoff Nut Stud Pin for Sheet Metal](https://engineeringhardware.com/product/stainless-steel-self-clinching-standoff-nut-stud-pin-for-sheet-metal/)

Round Head · GB

**US$0.0132 – 0.14**MOQ 10,000 pieces

[![BS-M6-2 Stainless Steel Pem Fastener BS Standoff Blind Self Clinching Nuts](https://img.engineeringhardware.com/BS-M6-2-Stainless-Steel-Pem-Fastener-BS-Standoff-Blind-Self-Clinching-Nuts.webp)](https://engineeringhardware.com/product/bs-m6-2-stainless-steel-pem-fastener-bs-standoff-blind-self-clinching-nuts/)

Self-Clinching, Press-Fit & Swage Fasteners

### [BS-M6-2 Stainless Steel Pem Fastener BS Standoff Blind Self Clinching Nuts](https://engineeringhardware.com/product/bs-m6-2-stainless-steel-pem-fastener-bs-standoff-blind-self-clinching-nuts/)

BS · DIN

**US$0.17 – 0.22**MOQ 1,000 pieces

[![Customized Design Metal Self Clinching Eye Studs for Building](https://img.engineeringhardware.com/Customized-Design-Metal-Self-Clinching-Eye-Studs-for-Building.webp)](https://engineeringhardware.com/product/customized-design-metal-self-clinching-eye-studs-for-building/)

Self-Clinching, Press-Fit & Swage Fasteners

### [Customized Design Metal Self Clinching Eye Studs for Building](https://engineeringhardware.com/product/customized-design-metal-self-clinching-eye-studs-for-building/)

Stud · Fasteners and Attachment Accessories 132

**US$0.006 – 1.20**MOQ 100 pieces

[![China Precision Hardware Stainless Steel Thru-Hole Self-Clinching Standoffs](https://img.engineeringhardware.com/China-Precision-Hardware-Stainless-Steel-Thru-Hole-Self-Clinching-Standoffs.webp)](https://engineeringhardware.com/product/china-precision-hardware-stainless-steel-thru-hole-self-clinching-standoffs/)

Self-Clinching, Press-Fit & Swage Fasteners

### [China Precision Hardware Stainless Steel Thru-Hole Self-Clinching Standoffs](https://engineeringhardware.com/product/china-precision-hardware-stainless-steel-thru-hole-self-clinching-standoffs/)

Flat Head · DIN, GB

**US$0.012 – 0.024**MOQ 50,000 pieces

[View all Self-Clinching, Press-Fit & Swage Fasteners →](https://engineeringhardware.com/fastener-products/threaded-inserts-clinch-fasteners/self-clinching-press-fit-swage-fasteners/) [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

Concealed-Head Self-Clinching Studs and Standoffs are bought for a small number of well-defined jobs. These are the ones we ship them for. Stocked from M3 to M6.

### Industries that specify Concealed-Head Self-Clinching Studs and Standoffs

- **Sheet-metal design:** Steel and 5052-H34 aluminum examples cover common panel materials.
- **Visible enclosures:** Concealed heads keep the outer panel face clean after installation.
- **Automotive interiors:** Hidden self-clinching threads support trim and equipment panels.
- **Instrument housings:** M3–M6 hardware fits compact covers and standoffs.
- **Steel fabrication:** Bolted structural and frame connections.
- **Automotive & transport:** Vibration-prone joints where the locking type is specified on the drawing.

### Typical applications

- keeping the head below the visible panel face
- adding a concealed-head stud or standoff to sheet metal
- selecting M3 through M6 and the applicable torque example
- matching the hardware to cold-rolled steel or 5052-H34 aluminum
- completing a bolted joint on a stud, rod or bolt
- locking an adjustment so it cannot drift

### 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.
- **High load:** Supplied in ISO 898-1 property classes, so the joint can be designed to a stated proof load and tightened to a calculated torque rather than by feel.
- **Match the class:** A nut below the bolt property class strips before the bolt reaches its own limit — pair class 8 nuts with 8.8 bolts, class 10 with 10.9.

### Where to use something else

- Do not apply the maximum tightening torque without checking the parent sheet and the concealed-head installation requirement.

[Full application guide: where Concealed-Head Self-Clinching Studs and Standoffs are used, how to specify them, and the cases they are wrong for](https://engineeringhardware.com/applications/concealed-head-self-clinching-studs-and-standoffs/)

## Technical Drawing

Dimensioned line drawing of M3 Concealed-Head Self-Clinching Studs and Standoffs to Trade series (concealed-head clinch hardware). Side view and top view, drawn to the dimensions in the table below and redrawn for any size selected.

- **Form:** concealed-head standoff or stud
- **Maximum tightening torque (Nu00b7m):** 0.55
- **Test sheet options:** cold-rolled steel / 5052-H34 aluminum
- **Installation:** self-clinching in sheet metal

## Dimensions & Specifications (Trade series (concealed-head clinch hardware))

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

| Thread size | Form | Maximum tightening torque (Nu00b7m) | Test sheet options | Installation |
| --- | --- | --- | --- | --- |
| [M3](https://engineeringhardware.com/guide/size/m3-concealed-head-self-clinching-studs-and-standoffs/) | concealed-head standoff or stud | 0.55 | cold-rolled steel / 5052-H34 aluminum | self-clinching in sheet metal |
| [M4](https://engineeringhardware.com/guide/size/m4-concealed-head-self-clinching-studs-and-standoffs/) | concealed-head standoff or stud | 2.0 | cold-rolled steel / 5052-H34 aluminum | self-clinching in sheet metal |
| [M5](https://engineeringhardware.com/guide/size/m5-concealed-head-self-clinching-studs-and-standoffs/) | concealed-head standoff or stud | 3.6 | cold-rolled steel / 5052-H34 aluminum | self-clinching in sheet metal |
| [M6](https://engineeringhardware.com/guide/size/m6-concealed-head-self-clinching-studs-and-standoffs/) | concealed-head standoff or stud | 7.2 | cold-rolled steel / 5052-H34 aluminum | self-clinching in sheet metal |

Concealed-Head Self-Clinching Studs and Standoffs are nuts manufactured to Trade series (concealed-head clinch hardware). This page lists the full dimensional range with the key specifications engineers need to select and specify them.

## What Are Concealed-Head Self-Clinching Studs and Standoffs?

Concealed-Head Self-Clinching Studs and Standoffs are nuts defined by Trade series (concealed-head clinch hardware). 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), alloy steel in property classes 8.8, 10.9 and 12.9, and stainless steel A2 (304) or A4 (316) for corrosion resistance. Specify the material, property class and surface finish appropriate to your load and environment.

## Pricing

Concealed-Head Self-Clinching Studs and Standoffs are supplied to order. Pricing starts from approximately US$0.10 per piece for standard sizes in carbon steel; 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 concealed-head self-clinching studs and standoffs outside the standard range?

Thread, height, across-flats, property class, locking feature and flange form can all be varied, including thread sizes the standard series does not run to. Made by cold heading or tapping.

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

[Custom nut manufacturing](https://engineeringhardware.com/custom/nuts/)[Send a drawing](https://engineeringhardware.com/custom/nuts/#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 standard are Concealed-Head Self-Clinching Studs and Standoffs manufactured to?

Concealed-Head Self-Clinching Studs and Standoffs are manufactured to Trade series (concealed-head clinch hardware). The dimensional values on this page follow that standard.

### What is the size range of Concealed-Head Self-Clinching Studs and Standoffs?

The table on this page lists 4 sizes for Concealed-Head Self-Clinching Studs and Standoffs, ranging from M3 to M6. Sizes outside the table can be quoted on request.

### In which materials are Concealed-Head Self-Clinching Studs and Standoffs supplied?

Concealed-Head Self-Clinching Studs and Standoffs are supplied in matching property-class 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 Concealed-Head Self-Clinching Studs and Standoffs.

### 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.