Value Collection 581081PR Hex Socket Cap Screw 3-48 Unc

Product Description

The VALUE COLLECTION 581081PR is a hex socket cap screw designed for precision fastening in applications where a compact drive profile is required. Threaded to the 3-48 UNC standard, it features a 5/64-inch hex drive and a 5/8-inch length under head. The screw is fully threaded along its entire length, maximizing thread engagement across thin materials or close-clearance joints. Constructed from alloy steel with a black oxide finish, it delivers solid tensile strength with moderate corrosion resistance. This fastener is installed by machinists, maintenance technicians, and assemblers working on mechanical equipment, fixtures, and precision assemblies.

This screw is suited for use in light mechanical assemblies, instrument housings, fixtures, and equipment where a low-profile socket drive is preferred over slotted or Phillips heads. The 3-48 UNC thread pitch is common in precision hardware, small-bore machine components, and instrumentation. The black oxide finish provides a clean, consistent appearance and mild resistance to oxidation in dry or lightly controlled environments. Sold in a minimum order quantity of 100 pieces, making it appropriate for production or maintenance stock.

Key Features

• 3-48 UNC thread form for standard precision fastening applications
• 5/8-inch length under head with full threading for maximum thread engagement
• 5/64-inch hex socket drive for use with standard hex keys or Allen drivers
• Alloy steel construction for high tensile strength in compact fastener form
• Black oxide coating provides mild corrosion resistance and uniform dark finish
• Meets ASME/ANSI B18.3 and ASTM A574 fastener standards

Compatibility

Designed as a standard 3-48 UNC hex socket cap screw suitable for threaded holes conforming to ASME/ANSI B18.3 specifications in light mechanical assemblies, precision instruments, and fixtures.

Installation Notes

Installation is performed using a 5/64-inch hex key or Allen-drive tool. Verify the mating threaded hole is clean, properly tapped to 3-48 UNC, and free of debris before driving the fastener. Do not exceed the rated drive engagement or apply impact tools to this fastener size, as small-diameter alloy cap screws are susceptible to shear at the drive socket. Follow applicable torque guidelines from ASME B18.3 or the equipment manufacturer for this thread class.