Value Collection 581228PR Hex Socket Cap Screw 6-40 Unf

Product Description

The VALUE COLLECTION 581228PR is an alloy steel hex socket cap screw designed for precision fastening in mechanical assemblies. This fastener features a 6-40 UNF thread form, a 5/16-inch length under head, and a 7/64-inch hex drive socket. It is fully threaded along its entire shank length. The black oxide finish provides a degree of corrosion resistance and surface hardness while reducing light reflection. This type of screw is commonly installed by machinists, millwrights, and maintenance technicians working on close-tolerance equipment, tooling fixtures, and precision mechanical components.

This screw is suited for applications requiring a low-profile socket-drive fastener with fine UNF threading. The 6-40 thread pitch is commonly used in instrument-grade and tight-tolerance assemblies where fine adjustment and secure clamping force are needed. Typical installation environments include machine tool components, jigs and fixtures, electronic enclosures, and light mechanical subassemblies. This fastener is sold individually per package with a minimum order quantity of 100 units.

Key Features

• 6-40 UNF fully threaded shank for fine-pitch fastening in precision assemblies
• 7/64-inch hex socket drive for use with standard Allen keys or hex drivers
• Alloy steel construction rated to ASTM A574 for high tensile strength
• Black oxide coating for mild corrosion resistance and reduced surface glare
• Meets ASME/ANSI B18.3 dimensional standards for socket head cap screws
• Fully threaded design maximizes thread engagement across the entire shank

Compatibility

Designed as an OEM-style fastener for precision mechanical assemblies requiring a 6-40 UNF socket head cap screw conforming to ASME/ANSI B18.3 and ASTM A574 standards.

Installation Notes

Installation is performed using a 7/64-inch hex key or hex bit driver. Ensure the mating threaded hole is clean and free of debris before driving the fastener. Apply appropriate thread torque for size 6 alloy steel fasteners per the applicable fastener standard or engineering specification. Avoid over-torquing, which can strip the fine UNF thread form in softer base materials.