ISO 7089Flat washer
ISO 7089 M5 Flat washer
ISO 7089 M5 is a flat washer, on a M5 × 0.8 mm metric thread. The general purpose flat washer. It protects the clamped surface, bridges oversized holes and spreads load under the head or nut.
Diameter5 mm
Pitch0.8 mm
Inside Ø d15.3 mm
Outside Ø d210 mm
Thickness h1 mm
Dimensions
- Standard
- ISO 7089
- Type
- Flat washer
- Size
- M5
- Thread
- M5 × 0.8
- Total height h
- 1 mm
- Inside diameter d1
- 5.3 mm
- Outside diameter d2
- 10 mm
Nominal values in millimetres as published in ISO 7089. Estimated weight 0.443 g per piece in steel (0.446 g in stainless), calculated from the nominal geometry — real parts vary with tolerance and head chamfers.
Thread data
Full M5 thread pageDesignationM5 × 0.8
Pitch0.8 mm
Major Ø5 mm
Pitch Ø4.48 mm
Minor Ø ext4.02 mm
Tap drillØ 4.2 mm
Other lengthsISO 7089 M5
All M5 specificationsInterchangeability
ISO 7089 is catalogued with DIN 125 A as its equivalent designation. Dimensions are compared field by field rather than assumed identical.