Brand BCP Fasteners
UPC 747960005408

Check the listing for details. 100 Qty 5/16" Stainless Steel SAE Split Lock Washers (BCP570). Condition: New. Listed at 11.55 USD. Industries that commonly use lock washers are transportation related (automotive, aircraft & marine). These are made out of a spring coil that cut or split. This makes it so the two ends of the coil forced outward to the mating surface so when the washer is fastened each end of the coil will bite into the surface of the head of the screw and to the surface to which you are fastening.

$8.09
$11.55