Typical hardness is HRB 70-100

as they’re designed to be an all-purpose anchor

1-8 x 4 A307A Hex Tap Bolt Zinc Plated

5/8-11 x 7 Hex Cap Screw SS 316 (A4)

3/16 x 4 Powers Combo Mushroom Toggle Bolt Zinc Plated (50) Titen HD® Heavy Duty Screw Anchors Mechanically Galvanized Typical hardness is HRB 70-1003 16 x 4 Powers Combo Mushroom 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