Skip to content
info@engineeringhardware.com
WhatsApp
Request a Quote
Washers · Sealing & Bonded Washers

EPDM Sealing Washers

7 catalogued sizes, dimensioned to Industry standard. Pick any row and the technical drawing redraws to it.

EPDM Sealing Washers to Industry standard are catalogued in sizes M6 to M10, with id 4.3-10.5 mm, od 11-25 mm, thick 2-3 mm. 7 sizes are held in the table below, and the technical drawing redraws to whichever row you select.

Standard
Industry standard
Size range
M6-M10
ID
4.3-10.5 mm
OD
11-25 mm
Catalogued sizes
7

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

EPDM Sealing Washers technical product image

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 Quotation for EPDM Sealing Washers

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 (Industry standard)

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

Screw sizeInner diameter d1 (mm)Outer diameter d2 (mm)Total thickness s (mm)EPDM thickness (mm)Backing materialTemperature range (deg C)Reference standard
No.8 (4.2 mm)4.3112.01.0Galvanised steel-40 to +130Industry standard
No.10 (4.8 mm)5.0142.01.0Galvanised steel-40 to +130Industry standard
No.12 (5.5 mm)5.6162.51.5Galvanised steel-40 to +130Industry standard
No.14 (6.3 mm)6.4192.51.5Galvanised steel-40 to +130Industry standard
M66.4192.51.5A2 stainless-40 to +130Industry standard
M88.4223.02.0A2 stainless-40 to +130Industry standard
M1010.5253.02.0A2 stainless-40 to +130Industry standard

EPDM Sealing Washers conform to Industry standard. As washers, they are specified by the dimensions in the table below; this page also covers materials, finishes and typical uses.

What Are EPDM Sealing Washers?

EPDM Sealing Washers are washers defined by Industry standard. They are selected by nominal bolt 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.

Typical Applications

Load distribution, surface protection and anti-loosening under bolt and nut heads in virtually all bolted joints. Read the full application guide for EPDM Sealing Washers →

Pricing

EPDM Sealing Washers are supplied to order. Pricing starts from approximately US$0.040 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.

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.

Video: EPDM Sealing Washers

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.

Frequently Asked Questions

What is the controlling standard for EPDM Sealing Washers?

EPDM Sealing Washers are manufactured to Industry standard. The dimensional values on this page follow that standard.

What is the size range of EPDM Sealing Washers?

The table on this page lists 7 sizes for EPDM Sealing Washers, ranging from No.8 (4.2 mm) to M10. Sizes outside the table can be quoted on request.

In which materials are EPDM Sealing Washers supplied?

EPDM Sealing Washers are supplied in carbon steel (zinc plated / HDG) 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 EPDM Sealing Washers.

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.