Size 3" Weight 1.99 Max. Opening 3" Min. Opening 0" Depth 2-3/8" Screw Dia. 5/8" Test Load 3,500 Lbs. Weight Per Box 1-3/4 Lbs. Conforms to Federal Specification GGG-C-406D, Type 1, Class A, light service, deep throat. Threads on our screws are Acme roll-threaded for maximum strength and clamping force.