Holo-krome 720003002 Hex Socket Cap Screw 5/8-11 Unc

Product Description

The HOLO-KROME 720003002 is a hex socket cap screw designed for high-strength fastening applications in industrial and mechanical assemblies. It features a 5/8-11 UNC thread and measures 8.5 inches in length under the head, making it well suited for deep-reach bolting where a standard-length fastener will not reach. The screw is manufactured from alloy steel with a black oxide finish that provides moderate corrosion resistance. Drive engagement is via a 1/2-inch hex socket, requiring a 1/2-inch hex key or bit. Threading is partial, meaning the shank provides an unthreaded grip length for shear-load applications. Licensed mechanics, millwrights, and maintenance technicians install this fastener type in structural and equipment assemblies.

This screw is appropriate for use in general industrial machinery, fixtures, tooling plates, and heavy equipment where a partially threaded, large-diameter socket cap screw is specified. It meets ASME B18.3 and ASTM A574 standards, which define dimensional tolerances and mechanical strength requirements for alloy steel socket cap screws. The black oxide finish is common in shop and indoor service environments. Partial threading allows the grip zone to carry shear loads without thread engagement in the joint material.

Key Features

• 5/8-11 UNC thread for high-load fastening in standard inch-series tapped holes
• 8.5-inch length under head for deep-reach or stacked-material applications
• Partially threaded shank to support shear loading across the joint interface
• Alloy steel construction meets ASTM A574 strength requirements
• Black oxide finish for surface protection in indoor and low-moisture environments
• 1/2-inch hex socket drive for use with standard hex keys or power bit drivers
• Meets ASME B18.3 dimensional standards

Compatibility

Designed as an OEM-style and general-use replacement or specification fastener for any application requiring a 5/8-11 UNC partially threaded alloy steel socket cap screw conforming to ASME B18.3 and ASTM A574.

Installation Notes

Installation should be performed by a qualified mechanic or millwright familiar with fastener torque requirements for the specific joint material and load conditions. Verify that the tapped hole depth and thread engagement length meet engineering specifications before installation. Use a properly sized 1/2-inch hex key or socket bit to avoid rounding the drive recess. Always consult the applicable equipment manufacturer torque specifications or relevant ASME standards for final torque values.