Value Collection 350-0520-61 Socket Cap Head Screw 5/16-18

Product Description

The VALUE COLLECTION 350-0520-61 is a fully threaded socket cap head machine screw designed for high-strength fastening applications across industrial, mechanical, and structural assemblies. Built from alloy steel with a black oxide finish, this screw provides good corrosion resistance and reduces galling in close-tolerance installations. It features a 5/16-18 thread size and measures 1-1/4 inches under the head. The Torx T45 drive requires a matching bit, which reduces cam-out compared to hex drives and allows higher installation torque. Machinists, millwrights, maintenance technicians, and equipment assemblers are the primary users of this fastener type.

This screw is suited for metal-to-metal fastening in machinery, fixtures, tooling plates, jigs, and mechanical assemblies where a low-profile cap head and high drive torque are required. The black oxide finish is common in industrial environments where light corrosion resistance and a non-reflective surface are preferred over plain steel. Fully threaded construction allows engagement along the full shank length, which is useful in thin material applications or where through-bolt configurations are used. Sold individually with a minimum order quantity of 100 pieces per order.

Key Features

• 5/16-18 UNC thread for standard inch-series fastening applications
• 1-1/4 inches length under head, fully threaded for maximum thread engagement
• Torx T45 drive reduces cam-out and supports higher installation torque than hex socket drives
• Alloy steel construction provides high tensile and shear strength
• Black oxide finish offers light corrosion resistance and a non-reflective surface
• Meets ANSI B18.3, ANSI B18.8.2, ANSI B2.2, and MS16555 standards

Compatibility

Designed as an OEM-style replacement or standard fastener for industrial machinery, mechanical assemblies, and structural fixtures requiring 5/16-18 inch-series socket cap head screws with a Torx T45 drive interface.

Installation Notes

Installation is typically performed by machinists, millwrights, or maintenance technicians using a T45 Torx bit or driver. Ensure mating threads are clean and free of debris before installation. De-energize and lock out all equipment before fastener replacement in powered assemblies. Do not substitute drive sizes, as using an undersized Torx bit can damage the drive recess and complicate removal.