Simpson Strong-Tie #12 1-1/2" Self-Drilling Screw, Hex-Washer Head - 305 Stainless Steel, Qty. 1,000 LTT/HTT Tension Ties Drill should be in rotation-only

Drill should be in rotation-only mode when drilling into soft masonry or into hollow backing material

Flexible design: #2 Roofjack size fits pipe sizes from 4" - 9-1/4"

Pitch Accommodation: Predeflected crescent washer allows installation on roof pitches up to 8/12

Simpson Strong-Tie Titen HD Concrete Screws are engineered for superior performance in cracked and uncracked concrete and masonry

With a wide washer-style head for maximum grip

Simpson Strong-Tie #12 1-1/2" Self-Drilling Screw, Hex-Washer Head - 305 Stainless Steel, Qty. 1,000 LTT/HTT Tension Ties Drill should be in rotation-onlyBuilt for dependable fastening in corrosive environments, the Simpson Strong Tie S12150HDUM Self Drilling Hex Washer Head Screws in 305 stainless steel offer lasting strength and durability. These fasteners are engineered to drive through steel with no pre drilling, making them a time saving solution for contractors, builders, and industrial pros. Designed with a low profile hex washer head and serrated threads, these screws deliver high holding power