Value Collection 207843 Hex Head Cap Screw 5/16-18 X 2-1/2 in

Product Description

The VALUE COLLECTION 207843 is a fully threaded hex head cap screw designed for general fastening applications across a wide range of industrial, mechanical, and structural assemblies. Manufactured from 18-8 stainless steel, this fastener offers reliable corrosion resistance in wet, outdoor, and chemically exposed environments. The screw features a 5/16-18 UNC thread and a 2.5-inch length under head, making it suitable for medium-duty clamping and assembly tasks. Machinists, millwrights, pipefitters, and general maintenance trades rely on hex cap screws like this for reliable, repeatable fastening with standard hex-drive tooling.

This fastener is suited for use in residential and commercial mechanical systems, equipment mounting, pipe support hardware, enclosure assembly, and structural connections where corrosion resistance is a priority. The 18-8 stainless steel grade is commonly specified in HVAC equipment mounting, plumbing support brackets, pool equipment installations, and marine-adjacent environments. Full threading along the shank provides consistent thread engagement across varying material thicknesses and eliminates the need for a clearance hole in thinner stock applications.

Key Features

• 18-8 stainless steel construction provides corrosion and oxidation resistance
• Fully threaded shank allows maximum thread engagement in any material thickness
• 5/16-18 UNC thread standard ensures compatibility with standard nuts, inserts, and tapped holes
• 2.5-inch length under head suits medium-depth fastening applications
• Hex drive head accepts standard hex wrenches and sockets for high-torque installation

Compatibility

Designed as a standard UNC inch-series hex head cap screw compatible with any 5/16-18 tapped hole, nut, or threaded insert per ASME B18.2.1 specifications.

Installation Notes

Install with a standard hex wrench, box-end wrench, or socket driver sized for a 1/2-inch hex head. Ensure mating tapped holes or nuts are clean and free of debris before installation. In stainless steel fastener applications, apply anti-seize compound to prevent thread galling, which is a known risk with 18-8 stainless against stainless mating threads. Follow applicable equipment manufacturer torque guidelines for the joint material and thread size.