Holo-krome 86442 Hex Socket Cap Screw 10-24 Unc Alloy Steel

Product Description

The HOLO-KROME 86442 is a partially threaded hex socket cap screw engineered for high-strength fastening applications in metal fabrication, machinery assembly, and mechanical maintenance. It carries a 10-24 UNC thread size and measures 2.5 inches under the head. The 5/32-inch hex drive is turned with a standard Allen-type hex key. Constructed from alloy steel with a black oxide finish, this screw delivers solid corrosion resistance and a clean, low-profile head profile suited to close-clearance assemblies. It conforms to ASME B18.3 and ASTM A574 standards, making it appropriate for structural and mechanical load-bearing applications where fastener grade matters.

This screw is a standard choice for machine builders, millwrights, maintenance technicians, and tool-and-die professionals working with steel components. The 10-24 UNC thread is common in light-to-medium duty machine frames, jigs, fixtures, and equipment enclosures. The partial thread configuration concentrates clamping force across the shank and is well suited to through-hole or clearance-hole assemblies where full threading is not needed. The black oxide finish blends into dark steel assemblies and provides mild surface protection in indoor environments.

Key Features

• 10-24 UNC thread for reliable engagement in standard machine-thread tapped holes
• 2.5-inch length under head accommodates medium-depth clearance and tapped-hole assemblies
• Partially threaded shank concentrates clamping load and suits clearance-hole fastening
• 5/32-inch hex socket drive accepts standard Allen keys and hex-bit drivers
• Alloy steel construction meets ASTM A574 mechanical requirements
• Black oxide coating provides mild corrosion resistance and a uniform dark finish

Compatibility

Designed as a standard ASME B18.3 hex socket cap screw for use in any application requiring a 10-24 UNC partially threaded fastener with a 5/32-inch hex drive.

Installation Notes

Installation is performed with a 5/32-inch hex key or Allen-bit driver; ensure the drive is fully seated before applying torque to avoid cam-out. Verify the receiving tapped hole meets 10-24 UNC thread specifications before installation. Apply thread-locking compound or hardware-grade fastener procedures as required by the equipment manufacturer or applicable mechanical codes. Inspect for proper seating and full thread engagement before returning the assembly to service.