The TIMco Twin Thread Zinc Countersunk Woodscrew is designed for general use in softwood and various hardwoods. It features a double countersunk head to reduce head shear and facilitate countersinking, and a twin-thread design that enables faster insertion with improved pull-out resistance. The screw is crafted from C10-18 steel with a zinc-plated finish for corrosion resistance, and it combines a sharp 25° point with a single lead start for quick penetration and better thread acceptance. With a 60° twin-thread profile and a parallel shank, it balances speed and strength, while its hardness specifications provide durability under load. This versatile fastener is suitable for use with TIMco and other leading plastic expansion plugs, supporting applications in both soft timber and masonry when paired with a plastic plug.
Features
- Size: 8 x 3/4
- Material: C10-18 steel
- Zinc plated: 3–5 μm
- 60° twin-threads with parallel shank
- Double countersunk head to reduce head shear
- Surface hardness up to 750 HV; core up to 450 HV
Usage
Primarily used in soft timber applications, the screw can also be used in masonry with a plastic plug. It is partially threaded from 1 1/4 inches and above. Compatible with TIMco and other leading plastic expansion plugs.
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