Hillman Fasteners 41544 Self Drilling Screw 75 Pack

Product Description

The HILLMAN FASTENERS 41544 is a self drilling screw designed for fast, reliable fastening in metal-to-metal and metal-to-substrate applications. The 8-18 thread designation indicates a No. 8 diameter with 18 threads per inch, and each screw measures 1 inch in length. The hex washer head provides a broad bearing surface and accepts standard hex drive tools, reducing cam-out during installation. Constructed from hardened steel with a zinc finish, these screws resist corrosion in typical interior and light exterior environments. This 75-piece pack suits service trucks, job site kits, and contractor supply bins where quick restocking matters.

Self drilling screws of this type are commonly used in light-gauge steel framing, HVAC duct work, electrical enclosures, and general sheet metal assembly. The 8-18 x 1 inch size is a standard fit for fastening thin sheet metal panels and brackets without pre-drilling a pilot hole. Licensed HVAC technicians, electricians, and sheet metal workers routinely stock this size for field repairs and equipment installations.

Key Features

• 8-18 thread form drills and taps its own hole in light-gauge sheet metal
• 1 inch length suits thin material stacks without over-penetration
• Hex washer head accepts 5/16 inch hex drivers and nut runners
• Hardened steel construction handles the torque demands of power tools
• Zinc finish provides corrosion resistance for interior and sheltered exterior use
• 75-piece pack quantity supports stocking van inventory or job site bins

Compatibility

Designed as a standard 8-18 x 1 inch self drilling screw suitable for light-gauge steel framing, sheet metal ductwork, electrical enclosures, and similar metal fastening applications.

Installation Notes

Self drilling screws are installed by electricians, HVAC technicians, and sheet metal workers using a hex-drive bit or nut runner set to appropriate clutch torque to avoid stripping. No pilot hole is required in light-gauge material. Do not overdrive — the washer head should seat flush against the substrate without deforming the material. Follow applicable codes such as the SMACNA duct construction standards or NEC enclosure guidelines when fastening electrical or HVAC components.