Value Collection 3120KW Self Drilling Screw 5/16 in Hex Washer

Product Description

The VALUE COLLECTION 3120KW is a self drilling screw designed for fast, reliable fastening in metal-to-metal and metal-to-substrate applications. It features a 5/16-inch hex washer head driven by a hex drive tool, eliminating the need for a pre-drilled pilot hole. The number 3 drill point cuts through material cleanly on contact. Made from grade 1016-1024 steel with a zinc-plated finish, this screw resists corrosion and meets AISI 1016, ASME B18.6.3, and SAE J78 standards. Electricians, HVAC installers, and sheet metal workers commonly use this fastener when securing duct work, panels, and structural framing components.

This screw is suited for light commercial and residential trade applications where a self-tapping, self-drilling fastener is required. The 1-1/4-inch length under head makes it appropriate for single- or double-layer sheet metal connections. The hex washer head distributes clamping load across a wider bearing surface, reducing the chance of pull-through on thinner gauge material. HVAC sheet metal technicians and general contractors will find this fastener appropriate for duct assembly, metal stud framing, roofing panels, and similar structural or enclosure work.

Key Features

• Number 3 drill point self-drills without a pilot hole, speeding up installation
• 5/16-inch hex washer head provides a wide bearing surface to resist pull-through
• Hex drive accepts standard hex bit drivers and nut drivers
• Grade 1016-1024 steel construction for reliable shear and tensile strength
• Zinc-plated finish provides corrosion resistance in typical indoor and sheltered applications
• Meets AISI 1016, ASME B18.6.3, and SAE J78 standards

Compatibility

Designed as a standard self drilling fastener for use in sheet metal, light-gauge steel framing, and similar trade applications where a 5/16-inch hex washer head screw with a number 3 drill point is specified.

Installation Notes

Installation is performed with a hex drive bit or nut driver sized for a 5/16-inch head. Apply steady, consistent pressure to allow the drill point to engage the material before the threads advance. Do not over-torque, as stripping the fastener or distorting thin sheet metal is possible with power tools set at high clutch settings. Follow applicable building codes and manufacturer specifications for fastener spacing and load requirements.