DIN 127Spring lock washer
DIN 127 M5 Spring lock washer
DIN 127 M5 is a spring lock washer, on a M5 × 0.8 mm metric thread. A split helical spring washer intended to resist loosening. Worth knowing that independent testing has repeatedly found its locking effect is marginal once the joint is properly preloaded — for safety critical joints use a prevailing torque nut instead.
Diameter5 mm
Pitch0.8 mm
Socket size s1.2 mm
Inside Ø d15.1 mm
Thickness h2.4 mm
Dimensions
- Standard
- DIN 127
- Type
- Spring lock washer
- Size
- M5
- Thread
- M5 × 0.8
- Socket size s
- 1.2 mm
- Total height h
- 2.4 mm
- Inside diameter d1
- 5.1 mm
Nominal values in millimetres as published in DIN 127.
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