Holo-krome 720002624 Hex Socket Cap Screw 1/2-13 Unc

Product Description

The HOLO-KROME 720002624 is a partially threaded hex socket cap screw designed for high-strength bolted assemblies in industrial, mechanical, and structural applications. It features a 1/2-13 UNC thread size and measures 9 inches in length under the head. The 3/8-inch hex drive socket accommodates a standard Allen key or hex bit driver. Constructed from alloy steel with a black oxide finish, this fastener delivers solid corrosion resistance and surface hardness suitable for demanding service environments. Machinists, millwrights, and maintenance technicians routinely specify this fastener type for precision equipment and heavy-duty fixtures.

This cap screw is suited for industrial machinery, jigs, fixtures, and structural assemblies where a recessed drive head is required for flush or countersunk installation. The partial thread configuration provides a grip length that distributes clamping load across the unthreaded shank, making it appropriate for applications requiring precise shear strength or alignment. It conforms to ASME B18.3 and ASTM A574 standards, ensuring dimensional and mechanical property compliance for engineered assemblies.

Key Features

• 1/2-13 UNC thread for reliable engagement in standard tapped holes
• 9-inch length under head with partial threading for controlled grip length
• 3/8-inch hex socket drive compatible with Allen keys and hex bit drivers
• Alloy steel construction meets ASTM A574 mechanical strength requirements
• Black oxide coating provides moderate corrosion resistance and reduces light reflection
• Conforms to ASME B18.3 dimensional standards

Compatibility

Designed as a standard ASME B18.3 hex socket cap screw for use in any application requiring a 1/2-13 UNC partially threaded fastener with a 3/8-inch hex drive.

Installation Notes

Installation should be performed by a qualified mechanic or millwright using a calibrated torque wrench and the appropriate 3/8-inch hex key or bit. Always confirm that the mating tapped hole is clean, undamaged, and cut to the correct UNC specification before driving the fastener. De-energize and lock out all machinery before fastener installation or removal in powered equipment. Apply thread lubricant or anti-seize only if specified by the equipment manufacturer, as dry torque values and lubricated torque values differ significantly.