Holo-krome 720003003 Hex Socket Cap Screw 5/8-11 Unc

Product Description

The HOLO-KROME 720003003 is a hex socket cap screw designed for high-strength fastening applications in industrial, mechanical, and structural assemblies. It features a 5/8-11 UNC thread and measures 9 inches in length under the head with partial threading. The drive is a 1/2-inch hex socket, requiring a standard Allen key or hex driver for installation. Constructed from alloy steel with a black oxide coating, this fastener delivers strong tensile performance and moderate corrosion resistance. It meets ASME B18.3 and ASTM A574 standards, making it a recognized choice for precision fastening work across a wide range of trade and industrial settings.

This screw is suited for mechanical assemblies, equipment mounting, and structural connections where a recessed-drive, high-torque fastener is required. Partial threading allows for proper clamping force across thicker material stacks. The 5/8-11 UNC coarse thread pattern is commonly used in general industrial and OEM applications. Typical installers include millwrights, maintenance technicians, and mechanical contractors working with steel fabrications, machine frames, and heavy equipment.

Key Features

• 5/8-11 UNC coarse thread for secure engagement in standard tapped holes
• 9-inch length under head for deep fastening in thick material assemblies
• Partial threading provides clamping force and shank engagement
• 1/2-inch hex socket drive for high-torque installation
• Alloy steel construction with black oxide coating for strength and surface protection
• Meets ASME B18.3 and ASTM A574 standards

Compatibility

Designed as an OEM-style replacement or direct-fit fastener for applications requiring a 5/8-11 UNC hex socket cap screw per ASME B18.3 specifications.

Installation Notes

Installation is typically performed by mechanical or maintenance technicians using a 1/2-inch hex key or Allen socket with appropriate torque tooling. De-energize and lock out any equipment before fastener removal or installation in powered assemblies. Inspect the tapped hole for damage or contamination before driving the screw. Follow applicable torque specifications from the equipment manufacturer or relevant ASME fastener guidelines.