Typical hardness is HRB 70-100

1-8 x 4 Grade 5 Hex Cap Screw Zinc Plated

The slots are on the end opposite the bearing surface

Typical hardness is HRC 24-35 for diameters up to 1 1/2 inches

3/4-10 x 6 Hex Tap Bolt 18-8 (A2) Stainless Steel Spike Impact Anchors 316 Stainless Steel Typical hardness is HRB 70-1003 4 10 x 6 Hex Tap Bolt 18 8 (A2) Stainless Steel . 18 8 stainless steel hex tap bolts 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