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OnBuy.com£1.90Visit shop R-Tech 337117 Pozi Countersunk Self-Tapping Screws No.4 1/2In 13.0Mm - Pk100 5053556010301
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The R-TECH 337118 Pozidriv countersunk self-tapping screws are an essential hardware solution for woodworkers, DIY enthusiasts, and metal fabricators who require a flush, professional finish when fastening materials. These screws offer excellent corrosion resistance and reliable holding power, making them ideal for sheet metal, wood, and plastic projects; however, they require careful pilot hole drilling in harder materials to prevent potential screw head stripping.
| Model Part Number | 337118 |
|---|---|
| Brand | R-TECH |
No. 6 refers to the gauge or diameter of the screw shank, which is a standard sizing convention for small-to-medium fasteners.
While it may fit loosely, it is strongly recommended to use a Pozidriv screwdriver bit to prevent cam-out and damage to the screw head.
They feature a zinc-plated, passivated finish which offers moderate protection, but they are primarily intended for indoor or sheltered outdoor environments.
The total length of the 337118 model is 9.5mm.
Yes, pre-drilling is recommended to prevent splitting the wood, especially when working near the edges of your material.
Ensure you are using a genuine Pozidriv bit rather than a Phillips bit and increase the size of your pilot hole.
This is often caused by driving into material without a proper pilot hole; ensure the pilot hole diameter is appropriate for the No. 6 gauge.
Ensure the countersink depth is correctly set before driving the screw home to avoid crushing the material surface.
For optimal results, ensure the correct pilot hole size is drilled before insertion, especially when working with hardwoods or metal. Use a screwdriver or impact driver compatible with Pozidriv bits—these are distinct from standard Phillips bits and provide a deeper, more secure grip. While the zinc-plated finish is resistant to corrosion, avoid using these screws in high-salinity or harsh marine environments, as long-term exposure may eventually degrade the coating. Store these screws in a dry area to maintain the passivated finish and prevent moisture buildup within the storage pack.
