Big Timber #15 x 4 In. Structure Screw (100 Ct.)

Structural lag screws feature heat-treated hardened steel for high tensile strength and high shear strength. They have triple layer ACQ compatible bronze coating for exterior or interior use. For use in log construction, timber frames, laminated beams, girders, ledger boards, stair rails, deck posts, fencing, SIP panels, and pole barns.

• Deep six-lobe star drive recess reduces cam-out end load
• Built-in washer head for increased pull through strength
• Type-17 tip for faster precise starts which eliminate walking
• Structural lag screw backed by certified independent testing (TER 1907-01)