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TIMCO Self Tapper Screws 4.2x32mm, PZ Countersunk Zinc, Bag of 16
TIMCO Self Tapper Screws in a bag of 16 are ideal for stitching or attaching to metal where a pre-drilled hole is required. Featuring a PZ2 drive, countersunk head, and zinc Cr3 plating, these 8 x 1 1⁄4 screws offer secure installation and reliable corrosion resistance. Fully threaded for enhanced grip, they’re manufactured to BS 4174:1972 for professional use in steel and thin sheet metal. Suitable for clean, dry environments and packaged for trade efficiency.
Product Information
Product Features
Applications & Uses
Metal Stitching
Used for stitching together laminar metal components in HVAC installations, ductwork, or light gauge steel structures, requiring pre-drilled holes for precision.
Sheet Metal Attachment
Ideal for securely attaching thin sheet metal panels to steel frames, common in electrical trunking and enclosure assembly where self-tapping threads are needed.
Frequently Asked Questions
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What material can these self tapper screws be used with?
They are designed specifically for use with steel and thin sheet metal. A pre-drilled hole in the substrate is necessary for proper installation.
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What driver bit is required for installation?
A PZ2 (Pozi size 2) driver bit should be used with these self tapping screws for secure engagement and effective fastening.
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Are these screws suitable for outdoor use?
With a corrosion rating of 1, these screws are best suited for clean, dry, and low humidity environments. They are not recommended for outdoor or high moisture applications.
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Why is a pre-drilled hole needed for these screws?
Although self-tapping, these screws require a pre-drilled pilot hole to allow the thread to cut into the metal substrate without causing material damage or thread stripping.
