Value Collection 015217PR Hex Socket Cap Screw 5/16-18 Unc

Product Description

The VALUE COLLECTION 015217PR is a hex socket cap screw designed for high-strength fastening applications in mechanical assemblies, industrial equipment, and structural components. It features a 5/16-18 UNC thread and measures 2-3/4 inches in length under the head, making it suitable for medium-depth fastening in confined spaces where a hex drive tool is required. The screw is machined from alloy steel and finished with a black oxide coating that provides moderate corrosion resistance and reduces light reflection. Drive size is 1/4 inch, accepting standard hex keys and Allen wrenches. The partial threading design concentrates clamping force in the shank, improving load distribution in bolted joints. Installers across manufacturing, maintenance, and industrial trades rely on this fastener for precision-fit assembly work.

This cap screw is appropriate for use in general industrial machinery, fixture building, tooling plates, and equipment maintenance across a range of commercial and industrial settings. Its partial thread design suits applications where the fastener passes through a clearance hole before engaging a tapped receiving hole. The black oxide finish makes it a common choice in applications where a low-reflectance or dark appearance is specified. It meets ASME/ANSI B18.3, ASTM A574, and IFI 124 standards, placing it in the standard grade range for high-strength socket cap screws used in demanding mechanical environments.

Key Features

• 5/16-18 UNC thread for compatibility with standard unified coarse-thread tapped holes
• 2-3/4 inch length under head accommodates medium-depth fastening applications
• Partially threaded shank improves clamping force and load distribution across the joint
• Alloy steel construction provides high tensile strength required for structural and mechanical use
• Black oxide finish offers moderate corrosion resistance and a low-reflectance appearance
• Meets ASME/ANSI B18.3, ASTM A574, and IFI 124 standards

Compatibility

Designed as an OEM-style replacement or direct-fit fastener for assemblies requiring a 5/16-18 UNC hex socket cap screw with a 2-3/4 inch length under head and a 1/4 inch drive. Consult your assembly drawing or equipment service manual to confirm thread engagement depth and torque requirements before installation.

Installation Notes

Installation is performed by maintenance technicians, millwrights, and industrial mechanics using a 1/4 inch hex key or Allen-drive tool. Always de-energize and lock out equipment before fastener replacement on powered assemblies. Verify that the tapped receiving hole is clean and free of debris before threading to avoid cross-threading or galling on the alloy steel threads. Do not exceed the torque specification listed in the equipment manufacturer's service documentation for this thread size and grade.