Stock up on best-quality hex lag screws suitable for a broad number of applications – construction, traffic, industrial, maintenance, and much more. For wood, these are stronger and thicker than the typical lag screws (aka lag bolts). As aluminum sign bolts, they’re ideal for fixing top-quality 0.080 aluminum signs from 95TSS to our galvanized steel posts. Size: 5/16”. Screw length: 2-1/2”. Fastener plating/material: Stainless steel. Drive style/Head style: Hex. Features: Self tapping. Corrosion resistant. Use with ½” drive. Looking for something else? Shop signs, posts, post bolts, stands, and so much more at 95TSS.