Value Collection R57001043 Hex Socket Cap Screw 5/16-18

Product Description

The VALUE COLLECTION R57001043 is a hex socket cap screw designed for fastening applications that require a recessed internal-drive interface. Threaded to 5/16-18 UNC specification, this fastener measures 6 inches in length under the head and accepts a 1/4 inch hex drive. Constructed from 18-8 stainless steel with a bright, uncoated finish, it delivers corrosion resistance suitable for both indoor and outdoor service environments. The UNC thread form is the standard unified coarse pitch used throughout North American mechanical and structural assemblies. This screw is installed by machinists, millwrights, pipefitters, and maintenance technicians working across industrial, HVAC, plumbing, and general fabrication trades.

This socket cap screw is appropriate for use in general mechanical assemblies, equipment mounting, panel fastening, and fixture construction where a low-profile head and high clamping force are needed. The internal hex drive allows torque application in confined spaces where a standard external-drive fastener cannot be seated with a wrench. Typical applications include machinery frames, pump housings, bracket assemblies, and structural steel connections where stainless corrosion resistance is a requirement.

Key Features

• 5/16-18 UNC thread for compatibility with standard unified coarse-pitch tapped holes
• 6 inch length under head for deep-reach fastening applications
• 1/4 inch internal hex drive for use with standard Allen or hex-key tooling
• 18-8 stainless steel construction provides corrosion and oxidation resistance
• Bright uncoated finish — no plating to affect thread tolerance or dimensional fit

Compatibility

Designed as a standard replacement or stock fastener for any assembly that calls for a 5/16-18 UNC socket cap screw with a 6 inch under-head length and 1/4 inch hex drive in 18-8 stainless steel.

Installation Notes

Installation requires a 1/4 inch hex key or Allen driver; use a calibrated torque wrench when specified torque values are called out in the equipment service manual. Clean and inspect the mating tapped hole for debris or damage before threading to avoid galling, which is a known risk with stainless fasteners. Apply an anti-seize compound appropriate for stainless steel if the fastener will be subject to high heat or repeated removal. Follow applicable mechanical codes and equipment manufacturer guidelines for torque and thread engagement depth.