Value Collection 581028PR Hex Socket Cap Screw 1-72 Unf

Product Description

The VALUE COLLECTION 581028PR is a hex socket cap screw designed for precise fastening in tight-clearance applications. Manufactured from alloy steel with a black oxide finish, this screw measures 1/2 inch in length under the head and is threaded 1-72 UNF — an extra-fine unified thread commonly used in instrument assemblies, optical equipment, and small mechanical components. The 1/16-inch hex drive allows use with a standard ball-end or straight hex key in confined spaces. Fully threaded along its entire shank, it provides consistent clamping force across the full engaged length. Installation requires a 1/16-inch hex key or driver bit.

This fastener is suited for light industrial, precision instrument, and small-equipment assembly work where a fine thread pitch and compact head profile are required. The 1-72 UNF thread size is standard in applications demanding controlled torque and resistance to vibration-induced loosening. Black oxide finish provides mild corrosion resistance and reduces light reflection on finished assemblies. Typically installed by machinists, instrument technicians, or precision assembly workers in production or field-service environments.

Key Features

• 1-72 UNF extra-fine thread for precise engagement and vibration resistance
• Fully threaded shank for maximum thread engagement over the full 1/2-inch length
• Alloy steel construction meets ASME/ANSI B18.3 and ASTM A574 standards
• Black oxide coating provides mild corrosion resistance and low-reflectance appearance
• 1/16-inch hex drive for use in confined or recessed fastening locations
• Minimum order quantity of 100 pieces supports production and assembly line use

Compatibility

Designed as a standard 1-72 UNF hex socket cap screw conforming to ASME/ANSI B18.3 and ASTM A574, suitable for tapped holes requiring a 1-72 thread form in precision instrument and small mechanical assemblies.

Installation Notes

Installation is performed with a 1/16-inch hex key or socket driver; confirm the mating tapped hole is clean and free of debris before driving. De-energize or power down any equipment before servicing fasteners on live assemblies. Do not exceed the design torque for the tapped material — alloy steel screws into softer substrates such as aluminum or plastic can strip threads if overtightened. Follow applicable mechanical assembly standards for the equipment type being serviced.