DIN 127Spring lock washer

DIN 127 M3 Spring lock washer

DIN 127 M3 is a spring lock washer, on a M3 × 0.5 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 M3d2 16⌀3.1h 1.6
DIN 127 M3 — Spring lock washerNominal dimensions in mm · Not to scale
Diameter3 mm
Pitch0.5 mm
Socket size s0.8 mm
Inside Ø d13.1 mm
Thickness h1.6 mm

Dimensions

Standard
DIN 127
Type
Spring lock washer
Size
M3
Thread
M3 × 0.5
Socket size s
0.8 mm
Total height h
1.6 mm
Inside diameter d1
3.1 mm

Nominal values in millimetres as published in DIN 127.

Thread data

Full M3 thread page
DesignationM3 × 0.5
Pitch0.5 mm
Major Ø3 mm
Pitch Ø2.68 mm
Minor Ø ext2.39 mm
Tap drillØ 2.5 mm

Other lengthsDIN 127 M3

All M3 specifications
M3