Value Collection 581100PR Hex Socket Cap Screw 3-56 Unf

Product Description

The VALUE COLLECTION 581100PR is a hex socket cap screw designed for precision fastening applications requiring a compact, high-strength connection. This fully threaded fastener features a 3-56 UNF thread size and measures 3/8 inches in length under the head. The 5/64 inch hex drive socket accepts a standard hex key or Allen wrench for installation in tight or recessed locations. Manufactured from alloy steel with a black oxide finish coating, it delivers corrosion resistance and a clean appearance suited for both mechanical and structural assemblies. This screw conforms to ASME/ANSI B18.3 and ASTM A574 standards, ensuring consistent dimensional tolerances and tensile strength across production lots.

This fastener is commonly used in precision equipment, tooling fixtures, instrumentation, and light mechanical assemblies where a low-profile socket head and fine thread pitch are required. The 3-56 UNF fine thread provides tighter thread engagement and greater resistance to loosening under vibration compared to coarse thread alternatives. Applicable in both shop and field environments, this screw is appropriate for machine builders, maintenance technicians, and fabricators working with small-format components in industrial or commercial settings.

Key Features

• 3-56 UNF fully threaded configuration for maximum thread engagement along the full fastener length
• 5/64 inch hex socket drive for use with standard hex keys in confined spaces
• 3/8 inch length under head suits shallow clearance and thin-material applications
• Alloy steel construction meets ASTM A574 mechanical requirements for socket cap screws
• Black oxide finish coating provides mild corrosion resistance and reduces light reflection
• Conforms to ASME/ANSI B18.3 dimensional standards for consistent fitment with mating hardware

Compatibility

Designed as an OEM-style replacement or general-use hex socket cap screw for applications requiring a 3-56 UNF thread, 3/8 inch length under head, and 5/64 inch hex drive conforming to ASME/ANSI B18.3 specifications.

Installation Notes

Installation is performed using a 5/64 inch hex key or Allen wrench; confirm the driver seats fully in the socket before applying torque to avoid stripping. Power down or de-energize any equipment before fastener service on live assemblies. Clean mating threads before installation to ensure accurate seating and consistent clamping force. Follow applicable ASME or equipment manufacturer guidelines for torque requirements appropriate to this thread size and material.