Size 6" Weight 5.25 Max. Opening 6" Min. Opening 0" Depth 3-5/8" Screw Dia. 3/4" Test Load 6,900 Lbs. Weight Per Box 4-3/4 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.