Holo-krome 72290 Hex Socket Cap Screw 5/8-11 Unc 5 in

Product Description

The HOLO-KROME 72290 is a hex socket cap screw designed for high-strength fastening applications in mechanical, industrial, and trade settings. It features a 5/8-11 UNC thread size with a 5-inch length under the head and is partially threaded along the shank. The drive is a 1/2-inch internal hex socket, accepting a standard Allen or hex key. Constructed from alloy steel with a black oxide coating, this screw provides solid mechanical strength and moderate corrosion resistance in dry or lightly oiled environments. Compliance with ASME B18.3 and ASTM A574 confirms dimensional accuracy and tensile performance appropriate for structural and precision fastening tasks.

This cap screw is suited for use in machinery assembly, equipment mounting, structural steel connections, and general mechanical fabrication where a recessed-drive, high-strength fastener is required. The partial threading allows the unthreaded shank to bear shear loads effectively, making it a practical choice for bolted joints that experience lateral stress. It is commonly installed by millwrights, pipefitters, industrial mechanics, and maintenance technicians across manufacturing, HVAC equipment mounting, and plumbing equipment installation contexts.

Key Features

• 5/8-11 UNC thread size for compatibility with standard coarse-thread tapped holes
• 5-inch length under head with partial threading for shear-load-bearing shank
• 1/2-inch hex socket drive for use with standard Allen keys or hex bit drivers
• Alloy steel construction meets ASTM A574 high-strength requirements
• Black oxide finish provides surface protection and reduces light reflection
• Conforms to ASME B18.3 dimensional standards for precise fit and interchangeability

Compatibility

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

Installation Notes

Installation should be performed by a qualified mechanic or tradesperson using a properly sized 1/2-inch hex key or Allen driver. De-energize and lock out all equipment before fastener installation or removal per applicable OSHA lockout/tagout procedures. Apply thread lubricant or anti-seize compound as appropriate for the joint material and environment. Do not exceed the rated tensile strength of the fastener by overtorquing without reference to a published torque specification for 5/8-11 ASTM A574 cap screws.