This page covers M3.5 Flat Washers to ISO 7089 / ISO 7093. M3.5 is the nominal bolt size; the dimensional row below is reproduced from the product table, followed by the tolerance, material and selection notes that apply to this size.
M3.5 Dimensional Row (ISO 7089 / ISO 7093)
| For bolt size | Inner diameter d1 min (mm) | Outer diameter d2 max (mm) | Thickness h (mm) | Reference standard |
|---|
| M3.5 | 3.7 | 8.0 | 0.5 | ISO 7089 |
Mating Parts for M3.5
A M3.5 flat washer pairs with a M3.5 bolt/screw and matching M3.5 nut.
Custom manufacturing · Made to drawing
Need flat washers in a size this table does not list?
This page covers M3.5 flat washers. Bore, outside diameter, thickness, temper and finish are the variables here — there is no thread to specify, so the fit and the bearing area are what the drawing has to pin down. Made by stamping or punching.
Minimum order from 2,000 pieces; samples within 7 days of drawing approval.
Custom washer manufacturingSend a drawing
Applications & Industries for M3.5 Flat Washers
Flat Washers are bought for a small number of well-defined jobs. These are the ones we ship them for. Stocked from M1.6 to M24 (nominal bolt size).
Industries that specify Flat Washers
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Rotating & vibrating plant
Spring, tooth and wedge types that maintain or lock bolt tension.
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Steel fabrication
Spreading load under a head or nut and protecting the surface finish.
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Machine building & OEM
Setting bearing area on soft alloy, plastic and oversized holes.
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Timber & construction
Large-diameter washers that stop pull-through in softer material.
Typical applications
- spreading clamp load over a soft or oversized bearing face
- protecting a painted or plated surface under a turned nut
- maintaining bolt tension in a joint that settles
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 Flat Washers are used, how to specify them, and the cases they are wrong for
