5/16X3 1/2 Hex Lag Screw Gimlet Point Black Oxide (Pack Qty 300) BC-3156LB

Steel: AISI 1006 - 1022 or equivalent steel.: Steel: 60,000 psi. minimum. Rockwell B70 - B100 Stainless: 18-8 stainless. Stainless: 100,000 - 125,000 psi. (approximate). Stainless: 1/4 through 1/2 in. diameter-- Rockwell B95 - C32 The minimum length of thread shall be equal to 1/2 the nominal screw length plus 0.50 in., or 5.00 in., whichever is shorter. Screws too short for this formula shall be threaded as close to the head as practicableYou may also like 5/16-18X2 1/2 Hex Head Flange Non Serrated Frame Bolt IFI-111 2002 Grade 8 Black Phosphate (Pack Qty 600) BC-3140BF.