Hillman Fasteners 41506 Self Drilling Screw 8-18 X 1/2 in 100pk

Product Description

The HILLMAN FASTENERS 41506 is a No. 8-18 x 1/2 inch self drilling screw designed for fast, reliable fastening in light-gauge metal and sheet metal applications. Constructed from hardened steel with a zinc finish for corrosion resistance, this screw features a Phillips drive pan head that seats flush and resists cam-out under power tool use. The self drilling point eliminates the need for a pilot hole, reducing installation time on the job. Each package contains 100 screws. These are a standard choice for HVAC technicians, electricians, and general contractors working with metal framing, ductwork, junction boxes, and similar assemblies.

This screw is well suited for light commercial and residential work wherever a No. 8-18 self drilling fastener is specified. Typical applications include securing sheet metal panels, attaching duct flanges, fastening electrical enclosures, and general metal-to-metal assembly. The zinc finish provides a basic level of protection in dry to mildly humid indoor environments. The pan head profile distributes clamping load across the surface, making it a reliable choice for thin-gauge metal connections that see vibration or thermal cycling.

Key Features

• No. 8-18 thread form with self drilling point — no pilot hole required
• Hardened steel construction for strength in metal fastening applications
• Zinc finish provides corrosion resistance in indoor and dry environments
• Phillips drive pan head for high torque transfer with standard bit tips
• 100 screws per package for convenient job-site use

Compatibility

Designed as a standard No. 8-18 x 1/2 inch self drilling screw suitable for light-gauge metal-to-metal fastening in HVAC, electrical, and general construction applications.

Installation Notes

Install with a Phillips No. 2 bit using a variable-speed drill or power screwdriver. Apply consistent pressure to keep the drill point on axis until the flutes engage the material. Do not overdrive — pan head screws in sheet metal can strip the material if torque is not controlled. Follow applicable codes such as the IMC or SMACNA standards when fastening ductwork or mechanical enclosures.