ISO 7089Flat washer
ISO 7089 M12 Flat washer
ISO 7089 M12 is a flat washer, on a M12 × 1.5 mm metric thread. The general purpose flat washer. It protects the clamped surface, bridges oversized holes and spreads load under the head or nut.
Diameter12 mm
Pitch1.5 mm
Inside Ø d113 mm
Outside Ø d224 mm
Thickness h2.5 mm
Dimensions
- Standard
- ISO 7089
- Type
- Flat washer
- Size
- M12
- Thread
- M12 × 1.5
- Total height h
- 2.5 mm
- Inside diameter d1
- 13 mm
- Outside diameter d2
- 24 mm
Nominal values in millimetres as published in ISO 7089. Estimated weight 6.273 g per piece in steel (6.313 g in stainless), calculated from the nominal geometry — real parts vary with tolerance and head chamfers.
Thread data
Full M12 thread pageDesignationM12 × 1.5 fine
Pitch1.5 mm
Major Ø12 mm
Pitch Ø11.03 mm
Minor Ø ext10.16 mm
Tap drillØ 10.5 mm
Other lengthsISO 7089 M12
All M12 specificationsInterchangeability
ISO 7089 is catalogued with DIN 125 A as its equivalent designation. Dimensions are compared field by field rather than assumed identical.