Description External serrated tooth lock washers are recommended for use in inaccessible application zones where it may be difficult to tighten the bolt or screw once fitted. Features: Gives a very high friction factor allowing for progressive and evenly distributed tightening torque around the head of the bolt or screw The edges of the teeth of this washer are encrusted in the head of the bolt or screw, forming an immobile unit resistant to loosening Shake proof washers Serrated tooth lock washers – quick reference Code Size Specs Qty WL04SEM04 M4 x 8.0 x 0.5mm SS 304 500 WL04SEM06 M6 x 11.0 x 0.7mm SS 304 200 WL04SEM10 M10 x 18.0 x 0.9mm SS 304 200 WL04SEM12 M12 x 20.5 x 1.0mm SS 304 100
