'T-Anchor, Toggle, Gravity Activated, Size (In.) 5/16 x 3-1/4, Ultimate Pullout (Lb.) 900, Ultimate Shear (Lb.) 2300, Anchor Dia./Drill Bit Sz. (In.)/TPI 5/16, Max. Work Thickness (In.) 2-1/4, Thread Length (In.) 1.55 In., Grip Range (In.) 1-1/4 - 2-1/4, Meets/Exceeds G.S.A. FF-B-588C, A.N.S.I. A58.1, A.S.T.M. B-633, Includes Body, Nut, Washer, Anchor Length (In.) 3-1/4, Bolt Dia. (In.) / Threads/In. 5/16 - 18, Box Count 4 per pack, Head Style Nut, Hole Dia. (In.) 5/16, Shank Length (In.) 3-1/4'