Dimensional data for M18 Flat Washers for Clevis Pins. Selection is by nominal bolt size rather than by thread, so the controlling figures are the ones in the row below together with the fit and tolerance the mating feature requires.
M18 Dimensional Row (ISO 8738)
| Size | Inner diameter d1 (mm) | Outer diameter d2 (mm) | Thickness h (mm) | h_max (mm) | Reference standard |
|---|
| M18 | 18 | 30 | 4 | 4.2 | ISO 8738 |
Mating Parts for M18
A M18 flat washer pairs with a M18 bolt/screw and matching M18 nut.
Custom manufacturing · Made to drawing
Need flat washers for clevis pins in a size this table does not list?
This page covers M18 flat washers for clevis pins. 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 M18 Flat Washers for Clevis Pins
Flat Washers for Clevis Pins are bought for a small number of well-defined jobs. These are the ones we ship them for. Stocked from M3 to M100 (nominal bolt size).
Industries that specify Flat Washers for Clevis Pins
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Construction machinery
pivot pins.
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Hydraulic cylinders
clevis and rod-end pins.
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Agricultural linkages
pins in tractor implements.
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Lifting equipment
shackle and link pins.
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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.
Typical applications
- matching clevis pin diameters
- spacing the cotter pin off the clevis face
- preventing wear on the clevis bore edge
- taking up axial play
- maintaining bolt tension in a joint that settles
- spreading clamp load over a soft or oversized bearing face
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.
Where to use something else
- Do not use a bolt washer on a clevis pin; its bore is sized for a thread, not the pin tolerance.
Full application guide: where Flat Washers for Clevis Pins are used, how to specify them, and the cases they are wrong for
