5/16X2 1/2 Indented Hex Flange Lag Screw Grade 2 Hot Dip Galvanized (Pack Qty 400) BC-3140LFG

Useful in constructing decks and also popular in timber assembly. Preferred by some over traditional lag screws because flat washers are not AISI 1006 - 1022 or equivalent steel Rockwell B70 - B100You may also like 8-32X1/4 Slotted Indented Hex Washer Head Machine Screw Fully Threaded Black Oxide (Pack Qty 10,000) BC-0804MSWB.