Value Collection -40869-4 Button Socket Cap Screw 50 Pack

Product Description

The VALUE COLLECTION -40869-4 is a button socket cap screw designed for precision fastening applications requiring a low-profile head and high tensile strength. The screw features a 1/4-28 UNF thread and measures 1 inch in length under the head, driven by a 5/32-inch hex socket. Manufactured from alloy steel with a black oxide coating, the fastener delivers corrosion resistance and a clean, uniform finish. Hardness is rated at 36-43 HRC, and the thread fit meets Class 3A tolerances for close-tolerance assemblies. Each pack contains 50 screws. Licensed HVAC techs, machinists, and general trade professionals use this fastener for equipment panels, brackets, and assemblies where a flush or recessed appearance is required.

This button head cap screw is suited for light to medium-duty fastening in equipment manufacturing, HVAC equipment assembly, panel mounting, and general mechanical fabrication. The black oxide finish reduces light reflection and provides mild corrosion protection in dry to low-humidity environments. The fully threaded shank and UNF thread standard make it compatible with tapped holes requiring fine thread engagement. The 50-piece pack quantity is appropriate for service inventory, production runs, or field kit restocking.

Key Features

• 1/4-28 UNF thread, Class 3A fit for tight-tolerance engagement
• 1-inch length under the head, fully threaded shank
• 5/32-inch hex socket drive for standard Allen key or bit driver
• Alloy steel construction rated 36-43 HRC
• Black oxide coating for corrosion resistance and low-glare finish
• Conforms to ANSI/ASME B18.3 and ASTM F835 fastener standards

Compatibility

Designed as a standard 1/4-28 UNF button socket cap screw suitable for tapped holes conforming to ANSI/ASME B18.3 specifications in equipment panels, brackets, and mechanical assemblies.

Installation Notes

Install using a 5/32-inch hex key or socket bit driver. Ensure the tapped hole is clean and free of debris before threading to avoid cross-threading. Power down or de-energize any equipment before accessing fastener locations on electrical panels or HVAC components. Do not exceed the rated hardness application range; consult engineering specs for dynamic or shear-load applications.