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The PECO FASTENERS tp-8x3/4dp500 is a No. 8 diameter, 3/4-inch hex washer head self-drilling screw sold in a 500-piece pack. Self-drilling screws drill the hole and tap the threads in a single operation, eliminating the need for a separate pilot hole step. This screw is suited for fastening into heavier-gauge metal substrates and is a standard choice for sheet metal assembly, HVAC ductwork, electrical enclosures, and light structural connections. Installation is handled by sheet metal workers, HVAC technicians, and electricians working with metal framing or enclosure panels.
The tp-8x3/4dp500 is designed for use in heavier-gauge metal applications. The Type 2 point geometry is rated for metal up to 0.100 inches thick. For heavier stock up to 0.175 inches thick, a Type 3 point variant is available. The hex washer head provides a broad bearing surface that resists pull-through and allows drive with a standard hex driver or nut driver, making it practical for high-volume installation with a power tool.
Designed as an OEM-style replacement or new-installation fastener for sheet metal assemblies requiring a No. 8 self-drilling screw with a hex washer head drive style.
Self-drilling screws should be driven with a variable-speed drill or screw gun set to the appropriate clutch setting to avoid stripping the threads on thin-gauge material. Verify metal substrate thickness before selecting point type, as using a Type 2 point on stock exceeding 0.100 inches may result in incomplete thread engagement. Follow applicable sheet metal and mechanical codes, including SMACNA guidelines where HVAC ductwork is involved.
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