Holo-krome 72298 Hex Socket Cap Screw 5/8-11 Unc Alloy Steel

Product Description

The HOLO-KROME 72298 is a hex socket cap screw designed for high-strength fastening in mechanical, industrial, and trade applications. It features a 5/8-11 UNC thread size with a 7-inch length under head and accepts a 1/2-inch hex drive. The fastener is partially threaded, which is standard for longer cap screws where full threading is not required. Constructed from alloy steel with a black oxide coating, it delivers solid corrosion resistance and surface hardness suitable for demanding service environments. This screw meets ASME B18.3 and ASTM A574 standards, confirming its compliance with recognized fastener specifications for critical assemblies.

This cap screw is used in mechanical assemblies, equipment fabrication, structural bolting, and general industrial maintenance where a recessed hex drive and high tensile strength are required. It is a common choice in HVAC equipment mounting, pump and motor assemblies, electrical enclosure construction, and similar trade applications where fasteners must hold under vibration and load. The 5/8-11 UNC thread is a coarse-thread designation widely used in North American industrial and mechanical work.

Key Features

• 5/8-11 UNC coarse thread for reliable engagement in standard tapped holes
• 7-inch length under head suits deep-reach fastening applications
• 1/2-inch hex socket drive for use with standard hex keys or socket drives
• Partially threaded shank reduces stress concentration and suits clearance-hole applications
• Alloy steel construction meets ASTM A574 high-strength requirements
• Black oxide finish provides mild corrosion resistance and reduces light reflection in service

Compatibility

Designed as a standard ASME B18.3 hex socket cap screw suitable for any application requiring a 5/8-11 UNC partially threaded fastener with a 7-inch length under head.

Installation Notes

Installation is typically performed by millwrights, maintenance technicians, or trade professionals using a calibrated torque wrench with the appropriate 1/2-inch hex bit or Allen key. Always verify that the mating tapped hole thread specification matches 5/8-11 UNC before installation. Do not use an impact driver at full torque without a torque-limiting socket, as alloy cap screws can be over-torqued and damaged. Follow the equipment manufacturer torque specification for the assembly being serviced.