1.375 Internal Retaining Ring Stainless Steel (Pack Qty 100) BC-137RISS

This is preferred when finished appearance is crucial and the teeth must be hidden under the head of the screw; also recommended for use with small heads such as fillisters Steel: SAE 1050 - 1065 spring steel. 18-8 Stainless: SAE 301 - 305 stainless steel. 316 Stainless: SAE 316 stainless steel. 410 Stainless: SAE 410 stainless steel