DIN 127Spring lock washer

DIN 127 M8 Spring lock washer

DIN 127 M8 is a spring lock washer, on a M8 × 1 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.

Dimensioned drawing — DIN 127 M8d2 16⌀8.1h 4
DIN 127 M8 — Spring lock washerNominal dimensions in mm · Not to scale
Diameter8 mm
Pitch1 mm
Socket size s2 mm
Inside Ø d18.1 mm
Thickness h4 mm

Dimensions

Standard
DIN 127
Type
Spring lock washer
Size
M8
Thread
M8 × 1
Socket size s
2 mm
Total height h
4 mm
Inside diameter d1
8.1 mm

Nominal values in millimetres as published in DIN 127.

Thread data

Full M8 thread page
DesignationM8 × 1 fine
Pitch1 mm
Major Ø8 mm
Pitch Ø7.35 mm
Minor Ø ext6.77 mm
Tap drillØ 7 mm

Other lengthsDIN 127 M8

All M8 specifications
M8