Value Collection 199721 Hex Socket Cap Screw 5/16-18 Unc

Product Description

The VALUE COLLECTION 199721 is a partially threaded hex socket cap screw designed for secure fastening in applications where vibration resistance and clean socket-drive installation are required. Sized at 5/16-18 UNC with a 2-1/2 inches length under head, this screw is driven with a 1/4 inch hex key. It is constructed from 18-8 stainless steel, offering good corrosion resistance in moderate-exposure environments. Trade professionals and maintenance technicians reach for this fastener when assembling equipment panels, mechanical supports, and structural fixtures that need a flush or countersunk socket-head profile with reliable clamping force.

This screw suits a wide range of light industrial, commercial, and trade service applications. It is appropriate for use in HVAC equipment panels, plumbing support structures, electrical enclosures, and general mechanical assemblies where a 5/16-18 UNC thread pattern is specified. The partial threading allows the unthreaded shank to bear shear loads while the threaded portion engages the mating nut or tapped hole, making it a practical choice in bolted joint designs that see both tension and lateral stress.

Key Features

• 5/16-18 UNC thread size for broad compatibility with standard tapped holes and hex nuts
• 2-1/2 inches length under head to accommodate thicker material stacks
• Partially threaded shank for improved shear load handling in bolted joints
• 1/4 inch hex drive for use with standard hex keys and socket drivers
• 18-8 stainless steel construction resists corrosion in moderate-moisture environments

Compatibility

Designed as a standard 5/16-18 UNC hex socket cap screw for use wherever this thread size and partial-thread configuration are specified in mechanical, structural, or equipment-mounting assemblies.

Installation Notes

Installation requires a 1/4 inch hex key or a hex socket bit rated for the fastener drive size. Ensure the mating tapped hole or nut matches the 5/16-18 UNC thread specification before driving. Do not overtighten stainless steel fasteners by feel alone, as galling can occur without proper lubrication; apply an appropriate anti-seize compound when installing into stainless or aluminum tapped holes. Follow applicable mechanical codes and equipment manufacturer torque guidelines for the specific assembly.