Value Collection 581087PR Hex Socket Cap Screw 3-48 Unc

Product Description

The VALUE COLLECTION 581087PR is a hex socket cap screw designed for precision fastening in mechanical assemblies, machine components, and structural applications. It features a 3-48 UNC thread size with a 1-inch length under head and is partially threaded for controlled engagement. The 5/64-inch hex drive socket head allows tightening with a standard Allen key or hex bit driver. Manufactured from alloy steel with a black oxide finish, this fastener delivers solid corrosion resistance and is suited for both indoor and light-duty outdoor installations. Licensed tradespeople and assembly technicians working in tight-clearance or recessed fastening scenarios will find this screw a reliable, specification-grade choice.

This hex socket cap screw is used in general mechanical assemblies, precision equipment, tooling fixtures, and industrial hardware applications where a low-profile, torque-resistant fastener is required. The 3-48 UNC thread is a fine unified coarse thread appropriate for small-diameter, high-torque fastening situations. The black oxide coating reduces surface friction and provides mild corrosion protection, making it suitable for indoor machinery and equipment service environments. It meets ASME/ANSI B18.3 and ASTM A574 standards, confirming dimensional and mechanical compliance for professional-grade use.

Key Features

• 3-48 UNC thread size for small-diameter, high-precision fastening
• 1-inch length under head with partial threading for controlled engagement depth
• 5/64-inch hex socket drive compatible with standard Allen keys and hex bit sets
• Alloy steel construction meets ASTM A574 mechanical strength requirements
• Black oxide finish provides mild corrosion resistance and reduced surface friction
• Conforms to ASME/ANSI B18.3 dimensional standards

Compatibility

Designed as an OEM-style replacement or standard-specification fastener for mechanical assemblies, tooling fixtures, and equipment requiring a 3-48 UNC hex socket cap screw per ASME/ANSI B18.3.

Installation Notes

Installation is performed by machinists, millwrights, or mechanical technicians using a properly sized 5/64-inch hex key or Allen driver. Ensure the mating threaded hole is clean and free of debris before installation. Do not exceed the rated seating torque for alloy steel fasteners at this thread size, and avoid cross-threading by hand-starting the screw before applying tool torque. Follow applicable machinery safety lockout and tagout procedures before servicing any assembly requiring fastener replacement.