3/4-10 x 12 A307 Grade A Carriage Bolt Zinc Plated

Flat Head thread cutting screw with machine screw thread with blunt tapered point

7/8-14 x 2 1/2 Grade 8 Hex Cap Screw Yellow Zinc Plated

304 and 305 series stainless steels so 18-8 is used at times to designate any and all of those alloy groups

3/4-10 x 24 A307 Grade A Carriage Bolt HDG

3-4 A194 2H Heavy Hex Nut Plain 7/8-9 Grade 8 Hex Cap Screws Yellow Zinc Plated 3/4-10 x 12 A307 Grade3 4 A194 2H Heavy Hex Nut Plain . A194 2H Heavy Hex Nuts are manufactured from 1045 steel to meet or exceed ASTM A194 Grade 2H. Hot Dip Galvanized material will meet or exceed ASTM A153 and or ASTM F2329. Galvanized nuts are over tapped per ASTM A563. Typical hardness is HRC 24 35 for diameters up to 1 1 2 inches, HRB 95 HRC 35 for diameters over 1 1 1 2 inches. Proof load strength is 175,000 psi.