Hardness of RC 38-43

51/64 x 6 Reduced Shank Drill Bit (1/2 Shank)

High red hardness of cobalt permits speeds 30% greater than standard heavy duty split point (HSS) drills

the expansion mechanism compresses and exerts force against the walls of the hole

50 x 40 Hex Cap Screw DIN 933 A2 (18-8) Stainless Steel - DIN 933 A2 Hex Cap Screws are manufactured from A2-70 stainless steel per ISO 3506 part 1

3/4-10 x 14 Socket Cap Screw Alloy Combo Flat Sleeve Anchors Zinc Plated Hardness of RC 38-433 4 10 x 14 Socket Cap Screw Alloy . Alloy Socket Head Cap Screws from Brighton Best. Hardness of RC 38 43, meets or exceeds ASTM A574. Manufactured from heat treated alloy steel, 1960 series.