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Flat Hd Self Drilling w/ Wings - Exterior Coating
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.
1,000 Salt Spray Corrosion Resistance Coating:
EXCELLENT CORROSION RESISTANCE AGAINST GAS, SALT WATER, SCRATCHES, WEATHERING,
AND OTHER CORROSIVE FACTORS, INCLUDING CONTACT WITH OTHER METALS.
| Size | Phillips Drive | Point | Drilling Capacity | Wood Thickness |
| 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” |
| 1/4-20 x 3-1/4 | #3 | #4 | .110 – .375 | 3/4” – 2-1/2” |
| 1/4-20 x 3-1/2 | #3 | #4 | .110 – .375 | 3/4” – 2-3/4” |
| 1/4-20 x 3-3/4 | #3 | #4 | .110 – .375 | 3/4” – 3-3/4” |
Call +1 800-468-8891
