Hillman 47221 #12 x 1-1/2" Hex Washer Head Self-Drilling Screw – Zinc-Plated Steel:

Product Overview

The Hillman 47221 Self-Drilling Screw is designed for heavy-duty fastening applications where strength and efficiency are essential. Its self-drilling point eliminates the need for pre-drilled pilot holes, allowing you to drill, tap, and fasten in one smooth operation. Featuring a hex washer head for superior torque control and a zinc-plated finish for corrosion resistance, this screw is ideal for metal-to-metal fastening and versatile enough for wood and fiberglass projects.

Key Features

• Self-Drilling Point – Drills and fastens in one step; no pilot hole required.
• Hex Washer Head – Provides secure grip and distributes load evenly for a strong hold.
• Zinc-Plated Finish – Offers moderate corrosion resistance for long-lasting durability.
• Coarse Threads – Create strong mating threads for a tight, secure fit.
• Easy Installation – Compatible with standard 5/16" hex driver bits.
• Heavy-Duty Design – Perfect for thicker metal applications.

Specifications

• Brand: Hillman
• Model: 47221
• Size: #12 x 1-1/2"
• Thread Type: Self-tapping, coarse thread (14 TPI)
• Point Type: #3 Self-Drill Point
• Head Style: Hex Washer
• Drive Size: 5/16" hex
• Material: Steel
• Finish: Zinc-plated
• Range of Material Thickness: Up to 12 gauge steel
• Package Options: 1 lb box (approx. 100–110 screws)

Applications

• Heavy-Duty Metal-to-Metal Fastening – Ideal for structural steel, sheet metal, and framing.
• Wood and Fiberglass Projects – Suitable for construction, repair, and assembly tasks.
• Industrial and Commercial Use – Common in manufacturing, automotive, and building projects.
• DIY Projects – Great for home improvement and general repairs.