External Tooth Lock Washer Metric A2 Stainless Steel

Stainless Steel Metric Lock Washers - External Tooth

Premium Metric Lock Washers for use with a Screw or Nut


External Tooth Lock Washers, also known as Star Lock Washers, are serrated washers that create tension between the washer's teeth and the installation surface.

  • Extra tension makes the fastener assembly resistant to rotation
  • Lock assemblies underneath the head of the fastener or a nut
  • Fastener industry standard A2 Stainless steel
  • Corrosion resistant properties
Actual measurements may vary slightly +/- depending on production run within IFI Tolerances


Washer Sizes Inner Diameter (ID) Outer Diameter (OD) Thickness
M4 4.3 8.0 0.5
M5 5.3 10.0 0.6
M6 6.4 11.0 0.7
M8 8.4 15.0 0.8
M10 10.5 18.0 0.9
M12 13.0 20.5 1.0
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