Skip to content
info@engineeringhardware.com
WhatsApp
Request a Quote
Washers · DIN 2093 · Application guide

What Are Disc Springs (Belleville Washers) Used For?

Typical applications, the industries that specify disc springs (belleville washers), and how to choose the right size, material and finish for the joint.

Disc Springs (Belleville Washers) are used for load distribution and anti-loosening under a bolt or nut. They are manufactured to DIN 2093, and selection is driven by the nominal diameter, the fit and tolerance the assembly requires, and the service environment.

Primary duty
Load distribution and anti-loosening under a bolt or nut
Governing standard
DIN 2093
Nominal diameter range
8 mm to 100 mm
Category
Washers

Application notes are general engineering guidance. Verify the property class and any approval requirement against your own design calculation.

What Are Disc Springs (Belleville Washers) Used For? application image

Disc Springs (Belleville Washers) (DIN 2093) are specified where the joint requires load distribution and anti-loosening under a bolt or nut. The sections below cover the typical end-uses by industry, the size and material decisions for each, assembly practice, and the applications this fastener type is not suited to. Stocked across roughly 8 mm to 100 mm, they cover general to heavy-duty work.

Typical Applications for Disc Springs (Belleville Washers)

The most common settings where these are specified:

  • Fabrication & metalwork: bench and on-site assembly of steel frames, enclosures and weldments.
  • Bolted structural joints: spreading load over soft or oversized holes and protecting the surface.
  • Vibration applications: spring and serrated types that maintain tension under cyclic load.
  • Timber & soft materials: large-OD types that prevent pull-through.
  • General machine building: fastening covers, brackets, motors and sub-assemblies on production equipment.

How to Specify Disc Springs (Belleville Washers) for Your Application

  • Size: Match the nominal size to the mating thread or hole. This product spans 8 mm–100 mm; check the full table below for the exact dimensions of each size.
  • Type & OD: Select flat for load spreading, spring/serrated for anti-loosening, or fender/large-OD for soft or oversized holes.
  • Environment: For damp, coastal or chemical exposure prefer A4/316 stainless or a suitable coating; indoors, plated steel or A2 is usually sufficient.
  • Standard: This product is supplied to DIN 2093. Quoting the standard on your order guarantees interchangeable dimensions between suppliers.

Installation & Assembly Practice

  • Place the washer under the rotating element (usually the nut) so tightening does not score the surface.
  • Chamfered-hole side of a hardened washer faces the bolt head fillet.
  • On serrated-flange hardware, do not add a plain washer — it defeats the serrations.

Common Selection Mistakes with Disc Springs (Belleville Washers)

  • Relying on a spring washer for locking on class 8.8+ joints — at high preload it flattens and adds nothing.
  • Choosing an OD too small for soft material, so the head pulls through or embeds.

Where Disc Springs (Belleville Washers) Are Not the Right Choice

A washer does not replace a locking feature on its own in severe vibration, and a spring washer adds little clamp on high-strength joints.

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.

Sends the selected values to the quote form below.

Request a Quote

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

Request a Quotation

Specification
Business Information

Dimensions & Specifications (DIN 2093)

Nominal sizeOuter diameter De (mm)Inner diameter Di (mm)Thickness t (mm)Height l0 (mm)Cone height h0 (mm)Force at flat F (N)Reference standard
884.20.40.550.15210DIN 2093 A
10105.20.50.700.20320DIN 2093 A
12.512.56.20.70.950.25620DIN 2093 A
14147.20.81.100.30810DIN 2093 A
16168.20.91.250.351000DIN 2093 A
18189.21.01.400.401250DIN 2093 A
202010.21.11.550.451530DIN 2093 A
22.522.511.21.251.750.501950DIN 2093 A
252512.21.52.050.552910DIN 2093 A
282814.21.52.150.652850DIN 2093 A
31.531.516.31.752.450.703900DIN 2093 A
35.535.518.32.02.800.805190DIN 2093 A
404020.42.253.150.906540DIN 2093 A
454522.42.53.501.007720DIN 2093 A
505025.43.04.101.1012000DIN 2093 A
565628.53.04.301.3011400DIN 2093 A
6363313.55.001.5015000DIN 2093 A
7171364.05.601.6020200DIN 2093 A
8080415.06.701.7033700DIN 2093 A
9090465.07.002.0031400DIN 2093 A
100100516.08.202.2048000DIN 2093 A
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

How do I choose the right size of Disc Springs (Belleville Washers)?

Match the nominal size to the mating thread or hole. This product is available from 8 mm to 100 mm; the full dimension table on this page lists each size.

Do Disc Springs (Belleville Washers) actually stop bolts loosening?

Spring and serrated washers help maintain tension under light vibration, but for critical joints a prevailing-torque locking nut or adhesive is more reliable. Flat washers mainly spread load and protect the surface.

What material should Disc Springs (Belleville Washers) be for outdoor use?

For damp, coastal or chemical environments specify A4 (316) stainless or a suitably coated steel. For indoor or dry use, A2 (304) stainless or zinc-plated steel is normally adequate.

Are Disc Springs (Belleville Washers) made to a recognized standard?

Yes — they are manufactured to DIN 2093, so dimensions are interchangeable between suppliers when you quote the standard on your order.

Can I get a quote for Disc Springs (Belleville Washers) in the size and material I need?

Yes. Use the technical drawing and quote form on this page to set the size and options, then send the exact configuration to our team for pricing and lead time.