Typical hardness is HRB 70-100

1-8 x 2 1/4 Grade 8 Hex Cap Screw Yellow Zinc Plated

5/8-11 x 3 Hex Cap Screw SS 316 (A4)

heat-treated alloy steel

1-8 x 10 Grade 5 Hex Cap Screw Zinc Plated

1/4 x 3 Powers Round Toggle Bolt Zinc Plated (50) 1/2-13 Hex Cap Screws 18-8 Stainless Steel Typical hardness is HRB 70-1001 4 x 3 Powers Round Toggle Bolt Zinc Plated (50) . The Toggle Bolt is a spring wing type hollow wall anchor designed for use in block, wallboard and other hollow base materials. The Toggle Bolt is a two part assembly consisting of a machine screw and a spring wing toggle. Sizes range from 1 8" x 2" to 1 2" x 6" with combo round, flat, mushroom, tie wire or slotted hex head styles. Download Powers Toggle Bolt Technical Data