Value Collection 31843 5/16-18 Unc Thread Cutting Screw

Product Description

The VALUE COLLECTION 31843 is a 5/16-18 UNC thread cutting screw designed for secure fastening in a wide range of trade and industrial applications. This screw features a hex head for reliable wrench engagement and a Type 1/Type D point, which cuts its own mating thread as it is driven into unthreaded material. Constructed from Grade 2 steel with a zinc-plated finish for basic corrosion resistance, the 31843 measures 0.5 inches in length under the hex head. It is a standard fastener used across HVAC, plumbing, electrical, and general sheet metal or structural assembly work.

This thread cutting screw is suited for light-gauge metal, plastic, and composite materials where a pre-tapped hole is not required. The 5/16-18 UNC coarse thread profile provides strong thread engagement in softer base materials. Typical installation scenarios include equipment enclosures, panel assembly, ductwork, junction boxes, and similar trade applications where a self-threading fastener reduces labor and eliminates the need for a separate tapping step. Sold individually, with a minimum order quantity of 50 units.

Key Features

• 5/16-18 UNC coarse thread cuts its own mating thread in unthreaded material
• Type 1/Type D point for reliable thread-forming entry without pre-tapping
• Hex head allows standard socket or wrench drive for consistent torque application
• Grade 2 steel construction provides adequate tensile strength for light-to-medium fastening loads
• Zinc-plated finish offers basic protection against corrosion in dry or mildly humid environments
• 0.5-inch length under hex head suits thin-gauge material stackups common in equipment assembly

Compatibility

Designed as a standard 5/16-18 UNC thread cutting fastener suitable for use in light-gauge steel, aluminum, and plastic assemblies where self-threading capability is required.

Installation Notes

Installation is performed with a standard hex wrench, socket driver, or impact tool sized for a 5/16-inch hex head. Ensure the base material thickness and hardness are appropriate for a thread cutting application before driving. Do not overdrive — strip-out is not recoverable in thread-cut holes without helicoil repair. Follow applicable mechanical codes and equipment manufacturer guidelines for fastener specifications in structural or pressure-boundary assemblies.