Dimensional data for M12 Conical Seat Washers, Type G. 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.
M12 Dimensional Row (DIN 6319 G)
| Size | d2 (mm) | d4 (mm) | d5 (mm) | h3 (mm) | Reference standard |
|---|
| M12 | 14.2 | 36.0 | 20.0 | 6.0 | DIN 6319 G |
Mating Parts for M12
A M12 flat washer pairs with a M12 bolt/screw and matching M12 nut.
Custom manufacturing · Made to drawing
Need conical seat washers, type g in a size this table does not list?
This page covers M12 conical seat washers, type g. 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 M12 Conical Seat Washers
Conical Seat Washers are bought for a small number of well-defined jobs. These are the ones we ship them for. Stocked from M6 to M30 (nominal bolt size).
Industries that specify Conical Seat Washers
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Heavy machinery
misaligned mounting.
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Machine tools
clamping on uneven surfaces.
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Fixtures
angled clamping.
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Presses
alignment compensation.
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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
- clamping on uneven faces
- compensating angular misalignment
- preventing bending of bolts
- pairing with spherical washers
- 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.
Where to use something else
- Do not use the conical seat alone; it only works paired with the spherical washer.
Full application guide: where Conical Seat Washers are used, how to specify them, and the cases they are wrong for
