GRK Black RSS Screws are perfect for deck framing or pergola installations when you want a better look. RSS Structural Screws are Heavy Duty lag screws designed for strong, tight connections.
GRK Black RSS Screws:
Black Coated Hardened Steel
25CT Boxes
T30 Bit Included In Each Box
5/16" Screws - 3-1/8", 4", 5-1/8", Or 6" Lengths
Approved For Treated Lumber
Washer Head For Superior Clamping Force
CEE Thread Enlarges Hole, Reducing Drive Torque
W-Cut Thread Designed For Low Torque & Faster Drive
Sharp Zip-Tip For Fast, Clean Starts Without Pre-Drilling
