Holo-krome 73154 Hex Socket Cap Screw 5/8-18 Unf Alloy Steel

Product Description

The HOLO-KROME 73154 is a hex socket cap screw designed for high-strength fastening applications in mechanical assemblies, industrial equipment, and trade installations. It features a 5/8-18 UNF thread size with a 2-inch length under the head and is fully threaded along its entire shank. The 1/2-inch hex drive socket accepts standard hex keys and Allen wrenches. Constructed from alloy steel with a black oxide coating, the fastener delivers corrosion resistance and reduces light reflection in finished assemblies. It meets ASME B18.3 and ASTM A574 standards, confirming compliance with dimensional and mechanical property requirements for socket cap screws.

This screw is suited for close-tolerance bolted joints where a flush or recessed fastener head is required. Common applications include machinery frames, motor mounts, HVAC equipment brackets, pump housings, and structural mechanical connections. The fine 18-TPI UNF thread pitch provides greater thread engagement and resistance to loosening under vibration compared to coarse-thread alternatives, making it a preferred choice in dynamic or high-cycle assemblies.

Key Features

• 5/8-18 UNF fine thread for improved vibration resistance and precise torque control
• 2-inch length under head, fully threaded for maximum thread engagement
• 1/2-inch hex socket drive compatible with standard hex keys and Allen wrenches
• Alloy steel construction meets ASTM A574 mechanical property requirements
• Black oxide finish provides mild corrosion resistance and low-glare appearance
• Conforms to ASME B18.3 dimensional standards for socket cap screws

Compatibility

Designed as a standard ASME B18.3 hex socket cap screw for use in any application requiring a 5/8-18 UNF fully threaded fastener with a 1/2-inch hex drive.

Installation Notes

Installation is typically performed by mechanical or maintenance technicians using a calibrated torque wrench with a 1/2-inch hex bit. De-energize and lock out all equipment before replacing or installing fasteners on live machinery. Apply thread lubricant or thread-locking compound only if specified by the equipment manufacturer. Verify mating thread condition and hole depth before installation to avoid bottoming out in blind holes.