Holo-krome 73164 Hex Socket Cap Screw 5/8-18 Unf Alloy Steel

Product Description

The HOLO-KROME 73164 is a hex socket cap screw designed for high-strength fastening applications in mechanical assemblies, industrial equipment, and trade installations. Sized at 5/8-18 UNF with a 3.5-inch length under head, this screw is partially threaded and driven with a 0.5-inch hex key. The alloy steel construction with black oxide coating delivers solid corrosion resistance and structural integrity under load. It meets ASME B18.3 and ASTM A574 standards, making it suitable for demanding fastener specifications in maintenance, fabrication, and equipment repair work.

This cap screw fits applications requiring a fine-thread UNF fastener with a socket drive interface. It is commonly used in machine frames, motor mounts, equipment enclosures, and structural assemblies where a flush or recessed fastener head is required. The 5/8-18 UNF thread pitch is appropriate for applications where fine thread engagement and controlled torque are priorities. Machinists, millwrights, HVAC equipment technicians, and industrial maintenance professionals regularly specify this type of fastener for precision mechanical work.

Key Features

• 5/8-18 UNF fine thread for precise engagement and controlled clamping force
• 3.5-inch length under head with partial threading for through-hole and clearance applications
• 0.5-inch hex socket drive for torque wrench and hex key installation
• Alloy steel construction meets ASTM A574 high-strength cap screw standard
• Black oxide finish provides moderate corrosion resistance and reduces light reflection
• Conforms to ASME B18.3 socket cap screw dimensional standard

Compatibility

Designed as a standard ASME B18.3 hex socket cap screw for use in any application requiring a 5/8-18 UNF partially threaded socket head fastener.

Installation Notes

Installation should be performed by a qualified mechanic or maintenance technician using a calibrated torque wrench and the appropriate 0.5-inch hex key or socket bit. Ensure mating threads are clean and free of debris before installation. Do not exceed the rated torque range for the fastener grade per ASTM A574 specifications. Always de-energize and lockout any equipment before replacing or installing fasteners in live mechanical assemblies.