Hillman Fasteners 41550 Self Drilling Screw 50 Pack

Product Description

The HILLMAN FASTENERS 41550 is a self drilling screw designed for fast, reliable fastening without a pre-drilled pilot hole. Built from hardened steel with a zinc finish, this screw features a hex washer head that provides a wide bearing surface and drives cleanly with a standard hex driver or nut driver. The 10-16 thread designation means a number 10 diameter with 16 threads per inch, suitable for sheet metal-to-sheet metal and sheet metal-to-light-gauge steel applications. Each package contains 50 screws. This fastener is commonly installed by HVAC technicians, sheet metal workers, and electricians during ductwork assembly, panel attachment, and general light-gauge steel fabrication.

These screws are suited for residential and commercial applications where speed and secure engagement matter. Typical use cases include securing HVAC duct sections, attaching sheet metal panels, and fastening light-gauge steel framing components. The hex washer head distributes clamping load evenly and resists pull-through in thin-gauge material. The zinc coating provides basic corrosion resistance for indoor and sheltered installations. Sold in a 50-count pack, they are a standard shop and service-van consumable for trades that work with sheet metal regularly.

Key Features

• Self drilling point eliminates the need for a separate pilot hole step
• Hex washer head drives with standard hex or nut driver bits
• Hardened steel construction for consistent thread engagement in light-gauge metal
• Zinc finish provides corrosion resistance for indoor and sheltered environments
• 10-16 x 3/4 inch size covers common sheet metal fastening applications
• 50-count pack sized for service stock and job-site use

Compatibility

Designed as a standard self drilling fastener for light-gauge sheet metal and steel applications typical in HVAC ductwork, electrical enclosures, and general sheet metal assembly.

Installation Notes

Self drilling screws are installed by HVAC technicians, sheet metal workers, and electricians using a hex driver bit with a standard drill or screw gun set to an appropriate clutch setting to avoid stripping. Ensure material thickness is within the rated drilling capacity of the screw point before driving. No pilot hole is required, but proper alignment and perpendicular driving angle improve thread engagement and head seating. Follow applicable codes such as the SMACNA duct construction standards when using these fasteners in HVAC applications.