Value Collection 581104PR Hex Socket Cap Screw 3-56 Unf

Product Description

The VALUE COLLECTION 581104PR is a hex socket cap screw designed for precision fastening in tight-clearance applications. Manufactured from alloy steel with a black oxide finish, this fastener meets ASME/ANSI B18.3 and ASTM A574 standards for dimensional accuracy and mechanical performance. It features a 3-56 UNF thread and a 5/64-inch hex drive, making it compatible with standard hex keys and allen wrenches. With a 5/8-inch length under head and full threading along the shank, it delivers consistent clamping force across the entire thread engagement length. Typical installers include mechanical assemblers, instrument technicians, and precision equipment service professionals.

This screw is suited for use in small-scale mechanical assemblies, instrumentation, electronics enclosures, and precision equipment where fine thread engagement and a low-profile socket head are required. The 3-56 UNF thread pitch provides a finer thread engagement than coarse-thread equivalents, making it a common choice in applications requiring vibration resistance or precise torque control in thin or delicate materials. The black oxide coating offers mild corrosion resistance in indoor or controlled environments.

Key Features

• 3-56 UNF thread for fine-pitch fastening in precision assemblies
• 5/8-inch length under head with full threading along the shank
• 5/64-inch hex socket drive for use with standard allen keys
• Alloy steel construction meets ASTM A574 mechanical requirements
• Black oxide finish provides mild corrosion resistance in controlled environments
• Conforms to ASME/ANSI B18.3 dimensional standards

Compatibility

Designed as an OEM-style replacement or standard-fit fastener for precision mechanical assemblies, instrumentation panels, and small-bore threaded applications requiring a 3-56 UNF hex socket cap screw.

Installation Notes

Installation should be performed by qualified mechanical assemblers or technicians familiar with fine-thread fastener practices. Use a properly sized 5/64-inch hex key to avoid stripping the socket drive. Ensure mating threads are clean and free of debris before installation. Do not exceed the recommended seating torque for the 3-56 UNF thread class as specified by ASME/ANSI B18.3 guidelines.