China Melparts produce all kinds of self locking washers, they are acting a fixed function after the insulation install on the CD weld pins, self-stick pins, perforated base pins, Lacing anchors, the self-locking washer hole size depend on the pin diameter to have a good hold power
Material
Low carbon steel, Aluminum, Stainless steel
Plating
Galvanized coating or cooper plating for low carbon steel
No Plating for Aluminum or stainless steel
Size
Square self-locking washer
2.5"×2.5"  1.5"×1.5"  1.25"×1.125"
Round self-locking washer
1"  1.18" 1.5" 2"
Use for
Pin diameter: 10GA( 3.4mm),  3mm, 12GA( 2.7mm)  14GA(2.0mm)

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