410 Stainless Steel Hex Washer TEK Screws – 390pcs Self-Drilling Set Sandpaper Abrasives (2) crimp the metal barrel

(2) crimp the metal barrel with a crimping plier to secure the wire mechanically

【Fine Workmanship】: The screw covers are accurate in size

7 mm | Wire Entry (B min

Prevents water leakage

Each screw is made from high-carbon steel

410 Stainless Steel Hex Washer TEK Screws – 390pcs Self-Drilling Set Sandpaper Abrasives (2) crimp the metal barrel410 Stainless Steel Hex Washer Head TEK Screws 390 Piece Self Drilling Assortment Metal roofing, HVAC ductwork, and structural metal framing all share one common frustration: stopping to pre drill pilot holes slows everything down. These 410 stainless steel TEK screws eliminate that step the self drilling tip bores through metal on contact, so you drive and fasten in a single motion with a standard hex driver. The hex washer head design distributes