Hillman Fasteners 116125 12-24 X 3/4 in Self Drilling Screw 90CT

Product Description

The HILLMAN FASTENERS 116125 is a hex washer head self-drilling metal screw designed for fast, reliable fastening in light-gauge metal applications. Sized at 12-24 x 3/4 inches and rated at 11 gauge, this screw features a self-drilling tip that eliminates the need for a pilot hole, saving time on the job. The star drive recess, combined with the included Pro-Stick bit, reduces cam-out and improves driver stability during installation. Sold in a 90-count box, this fastener is well suited for sheet metal work in HVAC, electrical, and general construction trade applications.

This screw is intended for metal-to-metal fastening where the combined material thickness does not exceed 1/8 inch. Its self-drilling point penetrates metal quickly without pre-drilling, making it a practical choice for field installation of ductwork, electrical enclosures, light structural steel framing, and similar assemblies. The hex washer head provides a broad bearing surface that resists pull-through on thin-gauge metal panels. Trades that commonly stock this fastener include HVAC sheet metal installers and electrical contractors working with metal enclosures and junction boxes.

Key Features

• Self-drilling tip penetrates metal up to 1/8 inch thick with no pre-drilling required
• 11 gauge, 12-24 x 3/4 inch hex washer head construction for broad clamping surface
• Star drive recess reduces cam-out during high-torque driving
• Pro-Stick compatible bit increases bit-to-screw engagement and driving stability
• 90-count box quantity suits bulk field use and service van stocking

Compatibility

Designed for metal-to-metal fastening in light-gauge sheet metal assemblies where combined material thickness does not exceed 1/8 inch, typical of HVAC ductwork, electrical enclosures, and similar thin-gauge metal construction.

Installation Notes

Installation is performed with a star drive bit; the included Pro-Stick bit is recommended to maintain engagement and reduce cam-out. Power down or de-energize any electrical enclosure or live system before fastening into or adjacent to it. Use a variable-speed drill or driver to control seating depth and avoid overdriving, which can strip the screw or deform thin sheet metal. Follow applicable codes such as NEC or SMACNA guidelines when fastening in electrical or HVAC applications.