Value Collection 581412PR Hex Socket Cap Screw 1/4-28 Unf

Product Description

The VALUE COLLECTION 581412PR is a partially threaded hex socket cap screw designed for high-strength fastening applications. It carries a 1/4-28 UNF thread size and measures 4-1/2 inches in length under the head. The 3/16-inch hex drive socket accepts a standard Allen or hex key for installation and removal. Constructed from alloy steel with a black oxide finish, this fastener delivers solid corrosion resistance in moderate environments while maintaining the high tensile strength required for mechanical assemblies. It meets ASME/ANSI B18.3 and ASTM A574 standards, making it appropriate for structural and precision fastening work across industrial and mechanical trade applications.

This screw is suited for use in machine assemblies, tooling fixtures, and mechanical components where a recessed drive fastener is needed to keep a clean surface profile. The fine 28-thread-per-inch pitch provides precise torque control and improved resistance to loosening under vibration, making it a common choice in applications where standard coarse-thread fasteners are not appropriate. Machinists, millwrights, and maintenance technicians typically install this fastener in steel and aluminum components.

Key Features

• 1/4-28 UNF fine thread for vibration resistance and precise torque control
• 4-1/2 inch length under head suits deep fastening applications
• 3/16 inch hex socket drive for use with standard Allen keys or hex drivers
• Alloy steel construction meets ASTM A574 high-strength fastener requirements
• Black oxide finish provides moderate corrosion resistance and reduced light reflection
• Conforms to ASME/ANSI B18.3 dimensional standards

Compatibility

Designed as an OEM-style replacement or direct-use fastener for mechanical assemblies requiring a 1/4-28 UNF partially threaded hex socket cap screw per ASME/ANSI B18.3 specifications.

Installation Notes

Installation is performed with a 3/16-inch hex key or Allen driver. Always power down or de-energize equipment before accessing fastened assemblies. Apply appropriate thread-locking compound or torque per the equipment manufacturer specifications for your specific application. Verify mating thread condition before installation to avoid cross-threading or galling in tight-tolerance bores.