---
title: "DIN 2093 Disc Springs (Belleville Washers) Specification"
description: "DIN 2093 Disc Springs (Belleville Washers): full dimensional table with tolerances. DIN, ISO and ASME equivalents listed side by side."
url: https://engineeringhardware.com/guide/standard/din-2093-disc-springs-din-2093/
source: Engineering Hardware & Fasteners
---

# DIN 2093 Disc Springs (Belleville Washers) Specification

Washers · DIN 2093

Dimensional table, tolerance classes and the DIN / ISO / ASME parts that supersede or match this standard.

DIN 2093 specifies the dimensions and tolerances for disc springs (belleville washers). The full dimensional table is reproduced below, followed by the DIN, ISO and ASME parts that match or supersede it.

- **Standard:** DIN 2093
- **Product:** Disc Springs (Belleville Washers)
- **Governing standards:** DIN 2093

Equivalence between national standards is dimensional, not always metallurgical. Check the property class separately when substituting.

![DIN 2093 Disc Springs (Belleville Washers) Specification reference image](https://engineeringhardware.com/wp-content/uploads/2026/08/Disc-Springs.webp)

For disc springs (belleville washers), DIN 2093 is the governing document for the dimensions listed below. Mechanical and performance requirements for this part family are set by its own standards, not by the bolt and screw property-class documents.

## DIN 2093 — Scope

The table below lists the dimensions catalogued for disc springs (belleville washers) under DIN 2093. The scope of DIN 2093 itself is not summarised here — where a figure matters, confirm it against the published document.

## Tolerance & Product Grades

Product grade is a concept from dimensional fastener standards and does not apply to DIN 2093. Tolerances for this part are the limits shown against each dimension in the table.

## Dimensions Specified by DIN 2093

| Nominal size | Outer diameter De (mm) | Inner diameter Di (mm) | Thickness t (mm) | Height l0 (mm) | Cone height h0 (mm) | Force at flat F (N) | Reference standard |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 8 | 8 | 4.2 | 0.4 | 0.55 | 0.15 | 210 | DIN 2093 A |
| 10 | 10 | 5.2 | 0.5 | 0.70 | 0.20 | 320 | DIN 2093 A |
| 12.5 | 12.5 | 6.2 | 0.7 | 0.95 | 0.25 | 620 | DIN 2093 A |
| 14 | 14 | 7.2 | 0.8 | 1.10 | 0.30 | 810 | DIN 2093 A |
| 16 | 16 | 8.2 | 0.9 | 1.25 | 0.35 | 1000 | DIN 2093 A |
| 18 | 18 | 9.2 | 1.0 | 1.40 | 0.40 | 1250 | DIN 2093 A |
| 20 | 20 | 10.2 | 1.1 | 1.55 | 0.45 | 1530 | DIN 2093 A |
| 22.5 | 22.5 | 11.2 | 1.25 | 1.75 | 0.50 | 1950 | DIN 2093 A |
| 25 | 25 | 12.2 | 1.5 | 2.05 | 0.55 | 2910 | DIN 2093 A |
| 28 | 28 | 14.2 | 1.5 | 2.15 | 0.65 | 2850 | DIN 2093 A |
| 31.5 | 31.5 | 16.3 | 1.75 | 2.45 | 0.70 | 3900 | DIN 2093 A |
| 35.5 | 35.5 | 18.3 | 2.0 | 2.80 | 0.80 | 5190 | DIN 2093 A |
| 40 | 40 | 20.4 | 2.25 | 3.15 | 0.90 | 6540 | DIN 2093 A |
| 45 | 45 | 22.4 | 2.5 | 3.50 | 1.00 | 7720 | DIN 2093 A |
| 50 | 50 | 25.4 | 3.0 | 4.10 | 1.10 | 12000 | DIN 2093 A |
| 56 | 56 | 28.5 | 3.0 | 4.30 | 1.30 | 11400 | DIN 2093 A |
| 63 | 63 | 31 | 3.5 | 5.00 | 1.50 | 15000 | DIN 2093 A |
| 71 | 71 | 36 | 4.0 | 5.60 | 1.60 | 20200 | DIN 2093 A |
| 80 | 80 | 41 | 5.0 | 6.70 | 1.70 | 33700 | DIN 2093 A |
| 90 | 90 | 46 | 5.0 | 7.00 | 2.00 | 31400 | DIN 2093 A |
| 100 | 100 | 51 | 6.0 | 8.20 | 2.20 | 48000 | DIN 2093 A |

## Equivalent Standards

Where direct equivalents exist (ISO ↔ DIN, ISO ↔ ASME), they are listed on the parent Disc Springs (Belleville Washers) page.

Always confirm against the dimensions on this page, since some "equivalent" standards differ in tolerances and head geometry.

## When to Specify DIN 2093

DIN 2093 is still widely used in European mechanical engineering and as a cross-reference on legacy drawings; its ISO equivalent is preferred for new designs.

Custom manufacturing · Made to drawing

## Need a washer to this standard in a non-standard size?

Parts built to DIN 2093 are already in the catalog, so a special is usually a variation on existing tooling rather than a new design — which is what keeps the cost down. Made by stamping or punching.

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

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

## Technical Drawing

Dimensioned line drawing of 8 Disc Springs (Belleville Washers) to DIN 2093. Side view and top view, drawn to the dimensions in the table below and redrawn for any size selected.

- **Outer diameter De (mm):** 8
- **Inner diameter Di (mm):** 4.2
- **Thickness t (mm):** 0.4
- **Height l0 (mm):** 0.55
- **Cone height h0 (mm):** 0.15
- **Force at flat F (N):** 210

## Dimensions & Specifications (DIN 2093)

| Nominal size | Outer diameter De (mm) | Inner diameter Di (mm) | Thickness t (mm) | Height l0 (mm) | Cone height h0 (mm) | Force at flat F (N) | Reference standard |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 8 | 8 | 4.2 | 0.4 | 0.55 | 0.15 | 210 | DIN 2093 A |
| 10 | 10 | 5.2 | 0.5 | 0.70 | 0.20 | 320 | DIN 2093 A |
| 12.5 | 12.5 | 6.2 | 0.7 | 0.95 | 0.25 | 620 | DIN 2093 A |
| 14 | 14 | 7.2 | 0.8 | 1.10 | 0.30 | 810 | DIN 2093 A |
| 16 | 16 | 8.2 | 0.9 | 1.25 | 0.35 | 1000 | DIN 2093 A |
| 18 | 18 | 9.2 | 1.0 | 1.40 | 0.40 | 1250 | DIN 2093 A |
| 20 | 20 | 10.2 | 1.1 | 1.55 | 0.45 | 1530 | DIN 2093 A |
| 22.5 | 22.5 | 11.2 | 1.25 | 1.75 | 0.50 | 1950 | DIN 2093 A |
| 25 | 25 | 12.2 | 1.5 | 2.05 | 0.55 | 2910 | DIN 2093 A |
| 28 | 28 | 14.2 | 1.5 | 2.15 | 0.65 | 2850 | DIN 2093 A |
| 31.5 | 31.5 | 16.3 | 1.75 | 2.45 | 0.70 | 3900 | DIN 2093 A |
| 35.5 | 35.5 | 18.3 | 2.0 | 2.80 | 0.80 | 5190 | DIN 2093 A |
| 40 | 40 | 20.4 | 2.25 | 3.15 | 0.90 | 6540 | DIN 2093 A |
| 45 | 45 | 22.4 | 2.5 | 3.50 | 1.00 | 7720 | DIN 2093 A |
| 50 | 50 | 25.4 | 3.0 | 4.10 | 1.10 | 12000 | DIN 2093 A |
| 56 | 56 | 28.5 | 3.0 | 4.30 | 1.30 | 11400 | DIN 2093 A |
| 63 | 63 | 31 | 3.5 | 5.00 | 1.50 | 15000 | DIN 2093 A |
| 71 | 71 | 36 | 4.0 | 5.60 | 1.60 | 20200 | DIN 2093 A |
| 80 | 80 | 41 | 5.0 | 6.70 | 1.70 | 33700 | DIN 2093 A |
| 90 | 90 | 46 | 5.0 | 7.00 | 2.00 | 31400 | DIN 2093 A |
| 100 | 100 | 51 | 6.0 | 8.20 | 2.20 | 48000 | DIN 2093 A |

Product catalog

## Related Disc Springs & Belleville Washers products

[![60si2mna Disc Spring Fixing Screws for Automotive Suspension with ISO 9001](https://img.engineeringhardware.com/60si2mna-Disc-Spring-Fixing-Screws-for-Automotive-Suspension-with-ISO-9001.webp)](https://engineeringhardware.com/product/60si2mna-disc-spring-fixing-screws-for-automotive-suspension-with-iso-9001/)

Disc Spring & Belleville Washers

### [60si2mna Disc Spring Fixing Screws for Automotive Suspension with ISO 9001](https://engineeringhardware.com/product/60si2mna-disc-spring-fixing-screws-for-automotive-suspension-with-iso-9001/)

Compression Spring · Black oxide , power coating , zinc plating , Nick…

**US$1.19 – 1.63**MOQ 6,500 sets

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Disc Spring & Belleville Washers

### [GB858 Belleville Spring Washer for Gearbox Shaft Locking DIN 2093 Compliant](https://engineeringhardware.com/product/gb858-belleville-spring-washer-for-gearbox-shaft-locking-din-2093-compliant/)

Lock Washer · Carbon Steel

**US$0.0006 – 0.0012**MOQ 1 piece

[![Lock Washers with Doule Faced Printing, DIN9250 Serrated Knurled Safety Lock Washers, 65mn Single Knurled Disc Spring Conical Contact Lock Washers](https://img.engineeringhardware.com/Lock-Washers-with-Doule-Faced-Printing-DIN9250-Serrated-Knurled-Safety-Lock-Washers-65mn-Single-Knurled-Disc-Spring-Conical-Contact-Lock-Washers-2.webp)](https://engineeringhardware.com/product/lock-washers-with-doule-faced-printing-din9250-serrated-knurled-safety-lock-washers-2/)

Disc Spring & Belleville Washers

### [Lock Washers with Doule Faced Printing, DIN9250 Serrated Knurled Safety Lock Washers, 65mn Single Knurled Disc Spring Conical Contact Lock Washers](https://engineeringhardware.com/product/lock-washers-with-doule-faced-printing-din9250-serrated-knurled-safety-lock-washers-2/)

Lock Washer · Stainless Steel

**US$0.0036 – 0.012**MOQ 5,000 pieces

[![DIN127 Stainless Steel Spring Wave Washers, Disc Spring Washer for Screw Bolt](https://img.engineeringhardware.com/DIN127-Stainless-Steel-Spring-Wave-Washers-Disc-Spring-Washer-for-Screw-Bolt.webp)](https://engineeringhardware.com/product/din127-stainless-steel-spring-wave-washers-disc-spring-washer-for-screw-bolt/)

Disc Spring & Belleville Washers

### [DIN127 Stainless Steel Spring Wave Washers, Disc Spring Washer for Screw Bolt](https://engineeringhardware.com/product/din127-stainless-steel-spring-wave-washers-disc-spring-washer-for-screw-bolt/)

Hexagon Head · ASTM

**US$0.096 – 0.24**MOQ 10,000 pieces

[![Customizable DIN6795 Sn70093 Manufacturer Stainless Steel French Ground Grounding Lock Washer Assembly Fastener](https://img.engineeringhardware.com/Customizable-DIN6795-Sn70093-Manufacturer-Stainless-Steel-French-Ground-Grounding-Lock-Washer-Assembly-Fastener.webp)](https://engineeringhardware.com/product/customizable-din6795-sn70093-manufacturer-stainless-steel-french-ground-grounding/)

Disc Spring & Belleville Washers

### [Customizable DIN6795 Sn70093 Manufacturer Stainless Steel French Ground Grounding Lock Washer Assembly Fastener](https://engineeringhardware.com/product/customizable-din6795-sn70093-manufacturer-stainless-steel-french-ground-grounding/)

Belleville Washer · DIN,ASTM/ANSI JIS En ISO,as,GB

**US$0.036 – 0.36**MOQ 10,000 pieces

[![Precision DIN 2093 Stainless Steel Carbon Steel Belleville Disc Spring Washers Hardware Fastener](https://img.engineeringhardware.com/Precision-DIN-2093-Stainless-Steel-Carbon-Steel-Belleville-Disc-Spring-Washers-Hardware-Fastener.webp)](https://engineeringhardware.com/product/precision-din-2093-stainless-steel-carbon-steel-belleville-disc-spring-washers/)

Disc Spring & Belleville Washers

### [Precision DIN 2093 Stainless Steel Carbon Steel Belleville Disc Spring Washers Hardware Fastener](https://engineeringhardware.com/product/precision-din-2093-stainless-steel-carbon-steel-belleville-disc-spring-washers/)

Belleville Washer · DIN,ASTM/ANSI JIS En ISO,as,GB

**US$0.036 – 0.36**MOQ 10,000 pieces

[View all Disc Spring & Belleville Washers →](https://engineeringhardware.com/fastener-products/washers/disc-spring-belleville-washers/) [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

What Disc Springs are specified for, industry by industry. Stocked from 8 to 100 (nominal diameter).

### Industries that specify Disc Springs

- **Machine tools:** Preload packs and clamping systems.
- **Flanged & gasketed joints:** Maintaining bolt load as a gasket relaxes.
- **Electrical connections:** Bus-bar joints that must stay tight through thermal cycling.
- **Timber & construction:** Large-diameter washers that stop pull-through in softer material.
- **Rotating & vibrating plant:** Spring, tooth and wedge types that maintain or lock bolt tension.
- **Steel fabrication:** Spreading load under a head or nut and protecting the surface finish.

### Typical applications

- maintaining bolt load in a joint that settles
- stacked in series or parallel to tune load and travel
- maintaining bolt tension in a joint that settles
- spreading clamp load over a soft or oversized bearing face
- protecting a painted or plated surface under a turned nut

### 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.
- **Hardness matters:** Under a high-strength bolt a soft washer embeds into the joint and preload is lost — specify a hardened washer for structural bolting.

[Full application guide: where Disc Springs are used, how to specify them, and the cases they are wrong for](https://engineeringhardware.com/applications/disc-springs-din-2093/)

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

### Can I substitute DIN 2093 for the corresponding DIN standard on a drawing?

On modern drawings the ISO standard is the master reference; the older DIN equivalent is a cross-reference. For most dimensional purposes the parts are interchangeable, but check tolerance grades and the head height — these are the most common points of divergence.

### Which edition of DIN 2093 does this table follow?

The table reproduces the dimensions we supply disc springs (belleville washers) to. We do not publish an edition year against it, so where the edition is contractually significant, cite the edition you require on the enquiry and we will confirm it against the table before quoting.

### 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.

## Related Pages

[View the full Disc Springs (Belleville Washers) page](https://engineeringhardware.com/fastener/disc-springs-din-2093/)