PRODUCT: 1/4-20 X 3-3/4 inch Flat Head TEK Screw with Wood Drilling Wings, #3 Phillips Drive, #4 Drill Point TEK, Zinc Plated. For attaching wood to heavy gauge Steel. 500/Box. Price/Box. (aks # 438wdz)
DESCRIPTION: Commonly used for attaching wood (to 2-1/2") to heavy gauge steel (to 0.25").
No predrilling. The hardened point provides penetration of steel substrates. Wings ream hole in wood, then detach when they reach steel.
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