Value Collection 581541PS Hex Socket Cap Screw 1/2-13 Unc

Product Description

The VALUE COLLECTION 581541PS is a hex socket cap screw designed for high-strength fastening applications in mechanical assemblies, tooling fixtures, and industrial equipment. It features a 1/2-13 UNC thread size and measures 1-3/8 inches in length under the head. The screw is fully threaded, meaning the thread runs the entire usable length of the shank. It is manufactured from alloy steel and finished with a black oxide coating that provides moderate corrosion resistance and reduces light reflection. This type of fastener is installed using a 3/8-inch hex drive key and is commonly specified by maintenance technicians, machinists, and mechanical contractors working to ASME and ASTM standards.

This cap screw is suited for residential and commercial mechanical applications where a recessed hex drive is required for flush or close-clearance installation. It is a standard UNC-threaded fastener appropriate for steel, cast iron, and similarly threaded materials in general industrial and OEM assembly environments. The black oxide finish makes it a common choice in applications where mild corrosion resistance and a non-reflective surface are both specified. It conforms to ASME/ANSI B18.3 and ASTM A574 dimensional and strength standards.

Key Features

• 1/2-13 UNC thread size for standard inch-series tapped holes
• 1-3/8 inches length under head, fully threaded along the entire shank
• 3/8-inch hex socket drive for torque application with an Allen key or hex bit
• Alloy steel construction for high tensile strength
• Black oxide finish provides mild corrosion resistance and a low-glare surface
• Conforms to ASME/ANSI B18.3 and ASTM A574 standards

Compatibility

Designed as a standard ASME/ANSI B18.3 and ASTM A574 compliant hex socket cap screw suitable for 1/2-13 UNC tapped holes in general industrial, OEM assembly, and mechanical maintenance applications.

Installation Notes

Install using a 3/8-inch hex key or socket bit driver; ensure the mating tapped hole is clean and free of debris before threading. De-energize any equipment and follow applicable lockout/tagout procedures before fastener replacement in live machinery. Do not exceed the torque rating for the joint material and always verify thread engagement depth is adequate for the load. Applicable work should conform to ASME or applicable structural standards for the installation type.