We-re nuts about bolts. Imperial, Unified & Metric.
M5 A2 ST/ST SHAKE PROOF WASHER - INT O/LAP TOOTH
Product Code: SOOM005I
Shake Proof Washers come in two different styles, overlapping tooth and open tooth. Each have the option of teeth on the outside edge or the inside edge.
They are available in carbon spring steel or stainless steel.
from Kerridge Commercial Systems Ltd