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Simpson Flat-Head Self-Drilling Screws with Wings - Square Drive 410 Stainless Steel

Simpson Flat-Head Self-Drilling Screws with Wings - Square Drive 410 Stainless Steel


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Simpson Flat-Head Self-Drilling Screws with Wings - Square Drive 410 Stainless Steel

  • Fasten wood, plywood and fiber cement to heavier steel – up to .209" thick
  • #3 square drive
  • Machine screw thread, threaded full length
  • 2 1/2" length for 2 x 4 wood header; 2" length for 1" and 3/4" boards
  • Flat countersunk head with self-countersinking nibs
  • Shank slot enhances thread formation in steel and removes exhaust
  • Wings above drill point provide clearance hole in work piece so it won’t climb up the shank, then break off as point engages the steel substrate
  • Drilling thickness capacities: up to .209" (171 mils, 7 ga) for #12, up to .250" (229 mils, 3 ga) for #14