Illustrative drawing. Actual product is confirmed to your specification at quotation.
Washers
Plain Washers
Also listed as Flat Washers
Plain washers (also called flat washers) spread the load under a nut or bolt head and protect the surface. Normal, small and large series cover different outside diameters. Hardness class 100 HV suits class 8.8 and below; 200 HV or hardened washers suit higher classes.
- Normal, small and large series
- Chamfered and unchamfered
- Steel, zinc plated, galvanised, stainless
Specifications
- Material
- Carbon steelSpring steelStainless steel A2 (AISI 304)Stainless steel A4 (AISI 316)
- Grade / property class
- Hardness class 100 HV / 140 HVA2A4
- Thread
- Not threaded
- Finish / coating
- Zinc plated (clear / yellow)Black oxidePlainHot-dip galvanised
- Size range
- Up to M6M8–M12M14–M24M27–M48
- Standards
- ISO 7089ISO 7090ISO 7091DIN 125 A / BDIN 433 (small series)IS 2016ASME B18.22.1
Exact dimensions, lengths and availability are confirmed at quotation.
Applications
- General bolted assemblies
- Structural and machinery joints
- Soft or painted surfaces
- Electrical and maintenance work
- Wood and plastic fastening
Technical reference
Plain washer dimensions (ISO 7089, normal series)
| For thread | Inside dia d1 (mm) | Outside dia d2 (mm) | Thickness h (mm) |
|---|---|---|---|
| M5 | 5.3 | 10 | 1.0 |
| M6 | 6.4 | 12 | 1.6 |
| M8 | 8.4 | 16 | 1.6 |
| M10 | 10.5 | 20 | 2.0 |
| M12 | 13 | 24 | 2.5 |
| M16 | 17 | 30 | 3.0 |
| M20 | 21 | 37 | 3.0 |
| M24 | 25 | 44 | 4.0 |
| M30 | 31 | 56 | 4.0 |
| M36 | 37 | 66 | 5.0 |
Inside diameter d1, outside diameter d2 and thickness h in mm, for the normal series. Small and large series use other outside diameters.
Related and complementary fasteners
Request a quote for Plain Washers
Give us the size, grade, finish and quantity. We reply within one business day.
Common questions
- Which sizes and grades of plain washers do you supply?
- We supply plain washers in Up to M6, M8–M12, M14–M24, M27–M48 size bands and grades/classes including Hardness class 100 HV / 140 HV, A2, A4. Exact availability, dimensions and lead time are confirmed at quotation.
- Which standards do plain washers follow?
- Common standards are ISO 7089, ISO 7090, ISO 7091, DIN 125 A / B, DIN 433 (small series), IS 2016, ASME B18.22.1. Tell us the standard you need and we will quote to it.
- Can you supply in bulk or with test certificates?
- Yes. We quote for loose lots and scheduled bulk supply across India, and can share manufacturer test certificates where available. Confirm the requirement when you request a quote.
Need a quote on bulk or custom industrial supply?
Share your specifications and quantities — our technical team will respond with pricing and lead time within one business day.