12-24 Impax 4.5 Self-Drilling Fastener


12-24 Impax 4.5 Self-Drilling Fastener. 12-24 Impax 4.5, Metal to Metal, Self-Drilling Fastener – Heavy Metal Thickness with Bond Seal Washer – Structural Drill Screw


Drilling Capacity:
.075 – .375
Thickness is based on a normal single thickness purlin/girt or multiple material thickness combined for total.
Thread Length:
12-24 x 1-1/4″: .650
Min. Projection:
3/16″ of threads below substrate

Advantages of Impax Self-Drilling Fasteners

    • Precision cold forged assuring superior point strength and the fastest drilling time performance through high strength steel and nested purlins.
    • Ultimate performance in light, medium, and heavy gage applications.
    • Designed and engineered to have low driving and thread engagement torque and provide maximum clamp load.
    • Corrosion resistant coating system.
    • Available painted to color match.


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