Value Collection 30040 Hex Head Cap Screw 5/16-18 X 4 in

Product Description

The VALUE COLLECTION 30040 is a Grade 5 steel hex head cap screw designed for general fastening applications across industrial, mechanical, and trade installations. It features a 5/16-18 UNC thread with a 4-inch length under head and is partially threaded, making it suited for applications that require a bearing surface or clamping force without full-length threads. The zinc-plated finish provides basic corrosion resistance for indoor and light-duty outdoor use. Each screw conforms to ASME B18.2.1 dimensional standards and is sold in packages of 100.

This fastener is commonly used in light structural assemblies, equipment mounting, and mechanical component attachment in residential and commercial trade work. The 5/16-18 UNC thread is a widely used coarse-thread size found in HVAC equipment frames, electrical panel mounting, plumbing fixture brackets, and general mechanical assemblies. The partial threading allows for tight clamping between two surfaces when used with a nut or in a tapped through-hole application.

Key Features

• Grade 5 steel construction for reliable tensile strength in general fastening applications
• 5/16-18 UNC coarse thread for broad compatibility with standard tapped holes and nuts
• 4-inch length under head with partial threading for effective clamping force
• Zinc-plated finish provides basic corrosion protection
• Conforms to ASME B18.2.1 dimensional standards
• Sold in a package quantity of 100 with a minimum order quantity of 1

Compatibility

Designed as a standard inch-series hex head cap screw suitable for use with 5/16-18 UNC tapped holes and compatible hex nuts in general mechanical and trade assembly applications.

Installation Notes

Installation is performed using a standard hex wrench, socket, or wrench drive sized for the 5/16-18 fastener. Always de-energize and isolate equipment before fastening components to electrical enclosures or panels. Follow applicable codes including NEC or IFGC requirements when used in code-governed assemblies. Do not exceed the rated load capacity of Grade 5 fasteners or substitute in applications requiring higher-grade hardware without engineering review.