8 External Tooth Countersunk Lock Washer 18 8 Stainless Steel (Pack Qty 1,000) BC-08WEC188

Designed for use with flat or oval head screws with countersunk angles of 82° or 100°. Steel: SAE 1050 - 1065 spring steel.. 18-8 Stainless: SAE 301 - 305 stainless steel. Steel: Rockwell C40 - 50. 18-8 Stainless: Annealed 88 minimum Rockwell B, 1/4 hard through full hard Rockwell C20 - 45