14 x 3 1/4 Simpson Flat-Head Self-Drilling Screw w/ Wings - Square Drive 410 SS - Box (100)
14 x 3 1/4 Simpson Flat-Head Self-Drilling Screw w/ Wings - Square Drive 410 SS - Box (100)
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14 x 3 1/4 Simpson Flat-Head Self-Drilling Screw w/ Wings - Square Drive 410 SS - Box (100) .
- 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
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