Value Collection 581171PR Hex Socket Cap Screw 5-40 Unc

Product Description

The VALUE COLLECTION 581171PR is a fully threaded hex socket cap screw designed for precision fastening applications requiring a compact, high-strength fastener. Threaded to the 5-40 UNC standard with a 7/8 inch length under head, this screw accepts a 3/32 inch hex drive and is manufactured from alloy steel with a black oxide finish for corrosion resistance. It meets ASME/ANSI B18.3 and ASTM A574 standards, making it suitable for applications where dimensional consistency and mechanical strength are required. This fastener is commonly installed by machinists, maintenance technicians, and mechanical assemblers working on equipment requiring fine-thread cap screws.

This screw is suited for use in machinery, tooling fixtures, electronic enclosures, and precision mechanical assemblies where a low-profile socket cap fastener is needed. The 5-40 UNC thread pitch is a fine, small-diameter specification typically found in instrumentation, small motors, and fabricated assemblies. The black oxide coating provides mild corrosion protection and reduces light reflection in optical or precision environments. Sold individually with a minimum order quantity of 100 pieces.

Key Features

• Fully threaded 5-40 UNC thread form for consistent engagement along the full shank length
• 3/32 inch hex drive socket for use with standard hex keys or Allen wrenches
• Alloy steel construction meets ASTM A574 mechanical requirements
• Black oxide finish provides mild corrosion resistance and a non-reflective surface
• Conforms to ASME/ANSI B18.3 dimensional standards
• Minimum order quantity of 100 pieces per order

Compatibility

Designed as an OEM-style replacement or standard-stock hex socket cap screw for any application requiring a 5-40 UNC fully threaded fastener with a 7/8 inch length under head and 3/32 inch hex drive.

Installation Notes

Installation is performed with a 3/32 inch hex key or Allen driver. Ensure mating threads are clean and free of debris before installation. Do not overtighten small-diameter fasteners, as alloy steel cap screws in fine-thread applications are susceptible to thread stripping when torque is applied beyond specification. Follow applicable machinery or equipment manufacturer torque guidelines for 5-40 UNC fasteners.