Value Collection -36871-3 Flat Socket Cap Screw 25 Pack

Product Description

The VALUE COLLECTION -36871-3 is a flat socket cap screw designed for precision fastening applications where a flush or countersunk profile is required. Sized at 1/4-28 UNF x 1 inch overall length, this fastener features an 82-degree flat head geometry and a 5/32-inch hex socket drive. Manufactured from alloy steel and finished in black oxide, it delivers solid mechanical strength alongside moderate corrosion resistance. The fully threaded shank provides consistent clamping force across the full engaged length. This screw is installed by machinists, maintenance technicians, and mechanical assemblers working in industrial, commercial, and OEM fabrication environments.

This flat socket cap screw is suited for applications requiring a low-profile, countersunk head in metal assemblies, machinery guards, fixtures, and precision equipment. The 1/4-28 UNF thread standard ensures compatibility with fine-thread tapped holes common in tooling, instrumentation, and close-tolerance mechanical assemblies. Black oxide finish makes it appropriate for interior applications or assemblies where light oil or corrosion-inhibiting treatments will be applied post-installation. Sold in a package quantity of 25 per order.

Key Features

• 82-degree flat head profile seats flush in standard countersunk holes
• 5/32-inch hex socket drive for use with standard Allen or hex key tools
• 1/4-28 UNF fine-thread form per ASME/ANSI B18.3 and ASTM F835 standards
• Fully threaded shank along the full 1-inch overall length
• Alloy steel construction provides high tensile and shear strength
• Black oxide finish reduces light reflection and offers mild surface protection

Compatibility

Designed for use in standard 1/4-28 UNF fine-thread tapped holes conforming to ASME/ANSI B18.3 countersunk fastener specifications. Suitable as a direct replacement in any application calling for an 82-degree flat socket cap screw in this thread size and length.

Installation Notes

Installation requires a 5/32-inch hex key or Allen driver; use of a properly sized driver prevents cam-out and socket damage. Countersink the mating hole to 82 degrees to achieve correct seating and flush surface profile. Follow ASME B18.3 torque guidelines for 1/4-28 alloy steel fasteners and apply thread-locking compound or anti-galling treatment as required by the assembly specification. Inspect the tapped hole for debris or damage before installation to ensure full thread engagement.