On this page 6 sections
Types of washers
Washers by material
Stainless Steel Washers
- SS 304 Washers
- SS 316 Washers
- SS 316L Washers
- SS 321 Washers
- SS 347 Washers
- SS 904L Washers
- Duplex 2205 Washers
- Super Duplex 2507 Washers
Nickel Alloys Washers
- Inconel 600 Washers
- Inconel 625 Washers
- Inconel 718 Washers
- Incoloy 800 Washers
- Incoloy 825 Washers
- Monel 400 Washers
- Monel K-500 Washers
- Hastelloy C22 Washers
- Hastelloy C276 Washers
Non-Ferrous Metals Washers
How they are made
Stamped or machined from plate or strip and heat treated where required.
Washers: how they are made, sized and tested
How it's madeStamped or machined from plate or strip and heat treated where required.
- Size range
- M6 – M100 and ¼" – 4" bolt sizes
- Finish
- Plain, zinc, galvanised
Testing & documents
- Hardness tests
- Dimensional checks
- EN 10204 3.1 certificate; 3.2 with third-party inspection
Marking and packing
Marking: Manufacturer mark and grade where required (e.g. F436).
Packing: Cartons or boxes with labels.
Frequently asked questions
Are washers needed with stud bolts?
Not always. Many flange joints use none, but hardened washers are used with controlled-tightening and tensioning methods, and where specified.
Which materials are washers available in?
Stainless Steel, Nickel Alloys, Non-Ferrous Metals: 20 grades in total, from stock or mill-sourced.
What sizes of washers do you supply?
M6 – M100 and ¼" – 4" bolt sizes.
How are washers tested?
Hardness tests; Dimensional checks.