Simpson #12 x 1-1/2" Self-Drilling Hex-Washer Head Screw, 305 Stainless Steel Joist Framing Connectors and a length of 18

and a length of 18 in

Replacement bits help compensate for variations in materials and driving techniques that can shorten driver-bit life

Tighten the two rods until each all-thread rod is visible in the Witness hole

brown through red (levels 2 - 5)

Diameter: 1-1/8"

Simpson #12 x 1-1/2" Self-Drilling Hex-Washer Head Screw, 305 Stainless Steel Joist Framing Connectors and a length of 18Model No. S12150HDU Coating Material. Type 305 Stainless Steel Screw size. #12 Drive Type. 5 16 in. Hex Length (in.) 1 1 2 Thread Type. Tapping Threads Head Type. Hex Washer Head TPI. 14 Point Type. Drill Point Use this Stainless Steel Self Drilling Hex Washer Head Screw for fastening aluminum and fiberglass (but not for steel). Applications Aluminum and fiberglass fastening (not steel) Key Features Indented hex washer head Tapping screw thread #3