Countersunk wing drill tek screws are used for joining timber to steel frame buildings. Breakaway wings will create a clearance hole to protect the thread then break off when they contact the metal surface to be drilled. Head is compatible with a No.3 phillips bit. Fire and corrosion resistant. The No.3 drill tip is a fixing suitable for light gauge steel up to 5mm. The No.5 drill tip is a fixing suitable for heavy gauge steel up to 12.5mm. Light duty countersunk tek screws vary in length from 38mm to 100mm, while heavy duty countersunk tek screws vary from 42mm to 100mm. Other sizes are available to order on request. Box quantities vary depending on size.
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