Value Collection 581498PR Hex Socket Cap Screw 3/8-24 Unf

Product Description

The VALUE COLLECTION 581498PR is a partially threaded hex socket cap screw designed for high-strength fastening applications in mechanical, industrial, and trade assembly work. It features a 3/8-24 UNF thread size and measures 4 inches in length under the head. Driven by a 5/16-inch hex key, this screw is manufactured from alloy steel with a black oxide finish that provides moderate corrosion resistance and reduces surface glare. It meets ASME/ANSI B18.3 and ASTM A574 standards, making it appropriate for structural and load-bearing fastening tasks performed by maintenance technicians, pipefitters, and mechanical contractors.

This cap screw is suited for residential and commercial mechanical assemblies where a recessed drive fastener is required. The fine 3/8-24 UNF thread pitch offers tighter thread engagement and greater tensile resistance compared to coarse-thread equivalents, making it a common choice in vibration-prone environments such as HVAC equipment frames, pump housings, motor mounts, and precision mechanical assemblies. It is installed with a standard hex key or Allen-drive socket.

Key Features

• 3/8-24 UNF fine thread for high tensile strength and vibration resistance
• 4-inch length under head accommodates deeper fastening applications
• 5/16-inch hex socket drive for use with standard Allen keys or hex bit sockets
• Alloy steel construction meets ASTM A574 high-strength fastener requirements
• Black oxide finish provides mild corrosion protection and low-glare surface
• Partially threaded shank allows precise clamping force on through-hole assemblies

Compatibility

Designed as a standard ASME/ANSI B18.3 hex socket cap screw for use in any application requiring a 3/8-24 UNF partially threaded fastener with a 5/16-inch hex drive.

Installation Notes

Installation is performed with a 5/16-inch hex key or Allen-drive socket. Always power down and de-energize equipment before fastening or removing hardware in electrical or mechanical assemblies. Thread engagement should be verified for proper depth before applying torque. Follow applicable ASME or equipment manufacturer guidelines for fastener seating in structural or load-bearing applications.