Simpson #12 x 1-1/2" Self-Drilling Hex-Washer Head Screw, 305 Stainless Steel Joist Framing Connectors brown through red (levels 2

brown through red (levels 2 - 5)

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

Because of this

including structural steel and extra-hard concrete

Simpson #12 x 1-1/2" Self-Drilling Hex-Washer Head Screw, 305 Stainless Steel Joist Framing Connectors brown through red (levels 2Model 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