GRK 12231 Rugged Structural Screw, 5/16" x 5-1/8" Concrete & Acid Brushes For horizontal mounting

For horizontal mounting

RS2 & CB3 cartridges

Optimized flute design to reduce stress and make the bit run cooler

Hardens in minutes

Convenient spray-through cap

GRK 12231 Rugged Structural Screw, 5/16" x 5-1/8" Concrete & Acid Brushes For horizontal mountingThe GRK 5 16 in. x 5 1 8 in. Steel Washer Head RSS Screws (50 Pack) are for use with pre drilled hardware and as lag screw replacements. The screws are designed with a small shank to limit splitting and to provide strength. Highlights: Bit size : #30 Size : 5 16" x 5 1 8" Built in washer Climatek coated Sharp threads and points W Cut thread design, Zip Tip Self tapping specially hardened steel screw