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Flat Head Self Drilling w/ Wings -Zinc Plated
Also referred to as a Header TEK Screw and used to fasten wood to steel.
Wings ream the hole larger than the threads so the threads will not engage the wood.
Wings break off when they hit the steel, then the threads engage.
Available in both Zinc Plated Steel and 1,000 Hour Daggar Guard Exterior Coating
| Size | Phillips Drive | Point | Drilling Capacity | Wood Thickness |
| 12-24 x 2 | #3 | #4 | .110 – .250 | 1/2” – 1*1/8” |
| 12-24 x 2-1/4 | #3 | #4 | .110 – .250 | 1/2” – 1-1/4” |
| 12-24 x 2-1/2 | #3 | #4 | .110 – .250 | 1/2” – 1-1/2” |
| 12-24 x 2-3/4 | #3 | #4 | .110 – .250 | 1/2” – 1-3/4” |
| 12-24 x 3-1/2 | #3 | #4 | .110 – .250 | 1/2” – 2-1/2” |
| 12-24 x 4 | #3 | #4 | .110 – .250 | 1/2” – 3” |
| 1/4-20 x 2-3/4 | #3 | #4 | .110 – .375 | 3/4” – 1-3/4” |
| 1/4-20 x 3 | #3 | #4 | .110 – .375 | 3/4” – 2” |
| 1/4-20 x 3-1/4 | #3 | #4 | .110 – .375 | 3/4” – 2-1/4” |
| 1/4-20 x 3-1/2 | #3 | #4 | .110 – .375 | 3/4” – 2-1/2” |
| 1/4-20 x 3-3/4 | #3 | #4 | .110 – .375 | 3/4” – 2-3/4” |
Call +1 800-468-8891
