Simpson Strong-Tie #12 x 1-1/4" Self-Drilling Strong-Drive XM Metal Screw, Medium Hex-Washer Head - Quik Guard Coating, Qty. 2,000 Decorative T Straps and L Straps and the larger-diameter anchor holes

and the larger-diameter anchor holes are for 1/4"-diameter concrete screw anchors

The Simpson Strong-Tie HIT Heavy I-Joist Top-Flange Hanger is built to deliver solid

305 stainless steel - delivers strong corrosion resistance in exterior environments

Dual-Embedment Line: Provides visual guidance for proper embedment depth

ensure alignment and spacing comply with local code and engineering guidelines

Simpson Strong-Tie #12 x 1-1/4" Self-Drilling Strong-Drive XM Metal Screw, Medium Hex-Washer Head - Quik Guard Coating, Qty. 2,000 Decorative T Straps and L Straps and the larger-diameter anchor holesLoad testing and code listing of Strong Drive metal screws ensures reliable performance and maximum load values. Comparative testing proves that XM Medium Head Metal screws from Strong Drive are superior to various fastener types in 33 ksi and 50 ksi steel decking. Key Features 5 16" hex drive (replacement driver bit: BITHEXR516 R1) 1 2" diameter hex washer head is ideal for narrow channel steel decking Available only in 1 1 4" length with #5 drill