ISO 7089Flat washer
ISO 7089 M3 Flat washer
ISO 7089 M3 is a flat washer, on a M3 × 0.5 mm metric thread. The general purpose flat washer. It protects the clamped surface, bridges oversized holes and spreads load under the head or nut.
Diameter3 mm
Pitch0.5 mm
Inside Ø d13.2 mm
Outside Ø d27 mm
Thickness h0.5 mm
Dimensions
- Standard
- ISO 7089
- Type
- Flat washer
- Size
- M3
- Thread
- M3 × 0.5
- Total height h
- 0.5 mm
- Inside diameter d1
- 3.2 mm
- Outside diameter d2
- 7 mm
Nominal values in millimetres as published in ISO 7089. Estimated weight 0.119 g per piece in steel (0.12 g in stainless), calculated from the nominal geometry — real parts vary with tolerance and head chamfers.
Thread data
Full M3 thread pageDesignationM3 × 0.5
Pitch0.5 mm
Major Ø3 mm
Pitch Ø2.68 mm
Minor Ø ext2.39 mm
Tap drillØ 2.5 mm
Other lengthsISO 7089 M3
All M3 specificationsInterchangeability
ISO 7089 is catalogued with DIN 125 A as its equivalent designation. Dimensions are compared field by field rather than assumed identical.