Internal Tooth Lock Washer Metric A2 Stainless Steel

Metric Stainless Steel Internal Tooth Lock Washers

Serrated Metric Lock Washers in A2 Stainless Steel


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

  • Added tension makes the fastener assembly resistant to rotation
  • Lock assemblies underneath the head of the fastener
  • Often chosen over External Tooth Lock Washers for aesthetic reason
  • Offer a durable and long lasting assembly
  • Corrosion Resistant
  • A2 Stainless steel
Actual measurements may vary slightly +/- depending on production run within IFI Tolerances


Washer Sizes Inner Diameter (ID) Outer Diameter (OD) Thickness
M2.5 2.7 5.5 0.4
M3 3.2 6.0 0.4
M4 4.2 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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