Our hex tap bolts meet our exceed ASTM A307 Grade A

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

53/64 x 6 Reduced Shank Drill Bit (1/2 Shank)

#39 x 6 High Speed Aircraft Bit Cobalt

7/8-9 x 2 1/2 Socket Set Screw Cup Point Alloy 7/16-20 Hex Cap Screws 18-8 Stainless Steel Our hex tap bolts meet7 8 9 x 2 1 2 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.