high/low thread form incorporates indentations ("teeth") that cut easily and quickly through high-density materials

7/8 x 6 Reduced Shank Drill Bit Cobalt (1/2 Shank)

3/4-10 x 1 1/2 Hex Cap Screw SS 316 (A4)

1/2-13 x 7 Grade 8 Hex Cap Screw Yellow Zinc Plated

5 x 220 Hex Cap Screw 8

5/8-11 x 3 1/4 Socket Set Screw Cup Point Alloy Nylon Insert Locknuts 18-8 Stainless Steel high/low thread form incorporates indentations5 8 11 x 3 1 4 Socket Set Screw Cup Point Alloy . A headless screw threaded the entire length. It has a hexagonal drive at one end and a cup shaped indentation at the other end. The cup point is the most used style set screw. Designed for fast, permanent and semi permanent location of parts on shafts with hardness differential of 10 15 Rockwell C points and where cutting in of cup edge on the shaft is acceptable. Hardness: Rockwell C45 53.