Value Collection 581540PS Hex Socket Cap Screw 1/2-13 Unc

Product Description

The Value Collection 581540PS is a hex socket cap screw designed for high-strength fastening applications across industrial, mechanical, and structural assembly work. The screw features a 1/2-13 UNC thread size and measures 1-1/8 inches in length under the head. It is fully threaded from tip to head, which maximizes thread engagement across the full grip range. Constructed from alloy steel with a black oxide finish coating, it delivers strong corrosion resistance in moderate environments. The 3/8-inch hex drive allows installation with standard hex keys or socket drive tools. Machinists, maintenance technicians, and fabricators are the primary installers of this type of fastener.

This socket cap screw is suited for use in machine assembly, fixture building, jig construction, and general industrial maintenance. The fully threaded design makes it appropriate for through-hole and close-tolerance applications where maximum thread engagement is needed. The alloy steel construction meets ASME/ANSI B18.3 and ASTM A574 standards, which are commonly specified in precision mechanical assemblies and OEM equipment builds. The black oxide finish provides a clean appearance while offering mild corrosion resistance for indoor and light-duty outdoor applications.

Key Features

• 1/2-13 UNC thread for compatibility with standard unified coarse thread nuts and tapped holes
• 1-1/8 inch length under head with fully threaded shank for maximum thread engagement
• Alloy steel construction meets ASTM A574 for high tensile strength requirements
• Black oxide finish coating provides mild corrosion resistance and reduced glare
• 3/8-inch hex socket drive for use with standard hex keys or socket wrenches
• Conforms to ASME/ANSI B18.3 dimensional standards

Compatibility

Designed as an OEM-style replacement or general-use hex socket cap screw for mechanical assemblies, fixtures, and equipment requiring 1/2-13 UNC fully threaded fasteners.

Installation Notes

Installation of socket cap screws requires a properly sized hex key or hex socket driver - a 3/8-inch drive is required for this fastener. Ensure the mating thread or nut is clean and free of debris before installation. Do not use impact tools at high torque settings without confirming the joint design supports it. Follow applicable fastener torque guidelines from your equipment OEM or a recognized engineering reference.