5/16-9X1 3/4 A/F.428-.437 Head Hgt .300-.312 Unslotted Indent Hex Washer Lag Screw Full Thread Zinc (Pack Qty 700) BC-312807LHWH

A/F.428-.437 Head Hgt .300-.312 Unslotted Indent Hex Washer Lag Screw Full Thread Zinc

Designed specifically for attaching track brackets and flag brackets of garage door assemblies to wooden door jambs