Hardness of RC 48-45

Grade 2 Finished Hex Nuts are manufactured from low carbon steel

5/8-18 x 5 1/2 Hex Cap Screw SS 18-8 (A2)

1/2 x 2 9/16 (1/4 Drive) Magnetic Nut Setter

7/8-14 x 7 Hex Cap Screw SS 18-8 (A2) 1/2-20 Hex Cap Screws 18-8 Stainless Steel Hardness of RC 48-457 8 14 x 7 Hex Cap Screw SS 18 8 (A2) . 18 8 stainless steel hex cap screws will have a typical composition of 18% chromium and 8% nickel. These percentages exist in 303, 304 and 305 series stainless steels so 18 8 is used at times to designate any and all of those alloy groups. 18 8 stainless steel offers good corrosion resistance and machines easily but will over time stain in coastal environments. They are also acceptable for use in ACQ pressure