Typical hardness is HRB 68 - HRC 32

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3/4 x 6 Reduced Shank Drill Bit (1/2 Shank)

9/16-12 x 3 1/2 Hex Cap Screw SS 316 (A4) M20-2.50 Hex Cap Screws DIN 933 18-8 Stainless Steel (A2) Typical hardness is HRB 689 16 12 x 3 1 2 Hex Cap Screw SS 316 (A4) . 316 series stainless steel differs from 18 8 by its molybdenum content (2 3%) and a higher nickel content (10 14%). 316 stainless steel has greater corrosion resistance than 18 8 as well as superior strength at high temperatures.