Value Collection 581358PR Hex Socket Cap Screw 12-28 Unf

Product Description

The VALUE COLLECTION 581358PR is a hex socket cap screw designed for high-strength fastening applications. It features a 12-28 UNF thread size, a 1-1/2 inch length under head, and a 5/32 inch hex drive. Constructed from alloy steel with a black oxide finish, this fastener provides solid corrosion resistance and is well-suited for tight-clearance installations where a hex key (Allen wrench) is required. Partial threading along the shank adds shear strength in applications that need a defined grip length. It meets ASME/ANSI B18.3 and ASTM A574 standards, making it appropriate for demanding mechanical assemblies.

This cap screw is used in a wide range of industrial and mechanical installations, including equipment brackets, motor mounts, pump housings, manifolds, and general machine assembly. It is commonly installed by millwrights, pipefitters, HVAC technicians, and maintenance mechanics working with threaded steel assemblies. The black oxide coating helps reduce reflectivity and provides light surface protection in dry to mildly humid environments. This screw is sold individually and requires a minimum order of 10 pieces.

Key Features

• 12-28 UNF thread form provides fine-pitch engagement for vibration-resistant clamping
• 1-1/2 inch length under head with partial threading for defined grip zone
• 5/32 inch hex drive for use with standard hex keys or socket drivers
• Alloy steel construction meets ASTM A574 high-strength cap screw specification
• Black oxide finish reduces surface corrosion and glare in service environments
• Conforms to ASME/ANSI B18.3 dimensional standards

Compatibility

Designed as a standard ASME/ANSI B18.3 hex socket cap screw suitable for any threaded assembly requiring a 12-28 UNF partially threaded fastener with a 5/32 inch hex drive.

Installation Notes

Install and remove using a calibrated hex key or socket driver sized to 5/32 inch. Ensure mating threads are clean and free of debris before installation. De-energize or lock out any equipment before replacing fasteners on live machinery per applicable safety procedures. The black oxide finish is not a heavy corrosion barrier; apply a thread lubricant or anti-seize compound when installing in environments with moisture exposure.