Holo-krome 73148 Hex Socket Cap Screw 5/8-18 Unf Alloy Steel

Product Description

The HOLO-KROME 73148 is a hex socket cap screw designed for high-strength fastening applications in mechanical assemblies, equipment manufacturing, and maintenance work. It features a 5/8-18 UNF thread with a 1-1/4 inch length under head and is fully threaded along its shaft. The drive is a 1/2 inch internal hex socket, requiring an Allen key or hex bit driver for installation. Constructed from alloy steel with a black oxide finish, this fastener delivers solid tensile strength and moderate corrosion resistance. It meets ASME B18.3 and ASTM A574 standards, confirming dimensional and mechanical compliance for critical fastening work.

The 73148 is suited for use in industrial machinery, structural assemblies, and equipment maintenance where a flush or low-profile cap screw is required. The UNF fine-thread pitch provides tighter thread engagement and is preferred in applications where vibration resistance or precise torque control matters. Typical installers include millwrights, maintenance technicians, and mechanical contractors working with ferrous or steel assemblies that require a reliable socket-drive fastener.

Key Features

• 5/8-18 UNF fine thread for tight engagement and vibration resistance
• Fully threaded shaft along the 1-1/4 inch length under head
• 1/2 inch hex socket drive for Allen key or hex bit installation
• Alloy steel construction meets ASTM A574 mechanical requirements
• Black oxide finish provides mild corrosion protection and reduces light reflection
• Conforms to ASME B18.3 dimensional standards

Compatibility

Designed as an OEM-style replacement or standard-spec fastener for mechanical assemblies requiring a 5/8-18 UNF hex socket cap screw per ASME B18.3 dimensional standards.

Installation Notes

Installation should be performed by a qualified mechanic or maintenance technician using a properly sized 1/2 inch hex key or socket bit driver. De-energize and lock out any equipment before fastener replacement or assembly work. Do not exceed the rated torque range for the fastener grade and thread size as specified by the equipment manufacturer. Inspect threads for damage or contamination before installation and apply thread lubricant only if called for by the assembly specification.