Value Collection 581278PR Hex Socket Cap Screw 8-36 Unf

Product Description

The VALUE COLLECTION 581278PR is an alloy steel hex socket cap screw designed for applications requiring a strong, compact fastener with a recessed drive. Threaded to an 8-36 UNF specification, this screw features a 1-1/2 inch length under head and a 9/64 inch internal hex drive. It is partially threaded along the shank, providing a smooth bearing surface where needed. The black oxide finish provides moderate corrosion resistance and reduces light reflection in service environments. Installers in mechanical assembly, HVAC equipment fabrication, and electrical panel work will find this screw suitable for close-clearance fastening where a standard hex head would interfere.

This fastener is appropriate for precision mechanical assemblies and equipment where fine-thread engagement is required. The 8-36 UNF thread form offers higher thread engagement per inch than coarse-thread equivalents, making it well suited for tapped holes in thin or moderately hard materials. It is commonly used in light-duty structural assemblies, equipment housings, and sub-assemblies where vibration resistance and thread retention are priorities. Quantities must be ordered in multiples of 100 per manufacturer minimum order requirement.

Key Features

• 8-36 UNF fine thread for increased holding strength and vibration resistance
• 1-1/2 inch length under head with partial threading along shank
• 9/64 inch internal hex socket drive for low-profile, recessed installation
• Alloy steel construction meets ASME/ANSI B18.3 and ASTM A574 standards
• Black oxide finish for moderate corrosion resistance and reduced surface reflectivity

Compatibility

Designed as a standard ASME/ANSI B18.3 hex socket cap screw suitable for use in any application requiring an 8-36 UNF internally-driven cap screw in alloy steel.

Installation Notes

Installation requires a calibrated 9/64 inch hex key or T-handle driver. Power down or de-energize any associated equipment before fastening in electrical or HVAC enclosures. Do not over-torque alloy socket cap screws in soft tapped base materials. Verify thread engagement depth meets design requirements before final assembly.