Value Collection 581543PS Hex Socket Cap Screw 1/2-13 Unc

Product Description

The VALUE COLLECTION 581543PS is a hex socket cap screw designed for high-strength fastening applications across industrial, mechanical, and trade installations. Sized at 1/2-13 UNC with a 1-5/8-inch length under head, this screw is fully threaded and accepts a 3/8-inch hex drive. Constructed from alloy steel with a black oxide coating, it provides corrosion resistance and reduces light reflection in service environments. This fastener meets ASME/ANSI B18.3 and ASTM A574 standards, making it suitable for demanding structural and mechanical assemblies where torque load and material strength are critical.

This socket cap screw is used in a wide range of trade and industrial applications including HVAC equipment mounting, mechanical assemblies, pump and motor housings, structural brackets, and general fabrication work. The 1/2-13 UNC thread is a coarse-thread standard commonly found in steel assemblies requiring reliable clamping force. The black oxide finish suits both indoor and moderate-exposure environments. Installation is typically performed by millwrights, pipefitters, HVAC technicians, or general tradespeople using standard hex keys or socket drive tools.

Key Features

• 1/2-13 UNC coarse thread for reliable engagement in steel assemblies
• 1-5/8-inch length under head, fully threaded
• 3/8-inch hex socket drive for use with standard hex keys or socket wrenches
• Alloy steel construction meets ASTM A574 high-strength fastener requirements
• Black oxide coating provides mild corrosion resistance and a low-glare finish
• Conforms to ASME/ANSI B18.3 dimensional standards

Compatibility

Designed as a standard 1/2-13 UNC hex socket cap screw suitable for use in any application calling for an ASME/ANSI B18.3 or ASTM A574 compliant fastener of this thread size and length.

Installation Notes

Installation should be performed using a properly sized 3/8-inch hex key or socket drive tool to avoid stripping the socket head. Ensure mating threads are clean and free of debris before driving. De-energize or lock out any equipment before replacing or installing fasteners in mechanical assemblies. Follow applicable industry torque guidelines for 1/2-13 UNC alloy steel fasteners as specified by the equipment manufacturer or relevant standards.