Value Collection 592281PR Hex Socket Cap Screw 1/4-28 Unf

Product Description

The VALUE COLLECTION 592281PR is a partially threaded hex socket cap screw designed for precision fastening in structural and mechanical assemblies. It features a 1/4-28 UNF thread size with a 2-1/4 inch length under the head and a 3/16 inch hex drive. Manufactured from 18-8 austenitic stainless steel (Austenitic Grade A2), this fastener offers corrosion resistance suited to both indoor and outdoor service environments. It conforms to ASME/ANSI B18.3 and ASTM F837 standards. Maintenance technicians, millwrights, and general contractors use this type of screw where a flush or low-profile head is required alongside a reliable socket drive.

This screw is appropriate for light mechanical assemblies, machine components, and fabrication work requiring a fine-thread UNF fastener. The 1/4-28 UNF thread pitch provides greater thread engagement per inch than coarse-thread alternatives, making it well-suited for thin-walled materials or applications where vibration resistance is a priority. The partial threading allows the unthreaded shank to align mating components before the threads engage. This fastener is commonly used in HVAC equipment panels, electrical enclosures, plumbing fixture frames, and general industrial fabrication.

Key Features

• 1/4-28 UNF fine thread for increased vibration resistance and pull-out strength in thin materials
• Partially threaded shank aids component alignment during assembly
• 18-8 austenitic stainless steel (Grade A2) provides corrosion resistance for wet or chemically exposed environments
• 3/16 inch hex socket drive compatible with standard allen keys and hex bit drivers
• Meets ASME/ANSI B18.3 and ASTM F837 fastener standards
• 2-1/4 inch length under head suits medium-depth fastening applications

Compatibility

Designed as an OEM-style replacement or general-use fastener for assemblies requiring a 1/4-28 UNF partially threaded hex socket cap screw in stainless steel.

Installation Notes

Installation is performed with a 3/16 inch hex key or hex bit driver. Ensure mating threads are clean and free of debris before driving the screw. Do not exceed the design torque range for 1/4-28 stainless steel fasteners, as over-torquing can cause galling on stainless threads. Apply an anti-seize compound where stainless-to-stainless thread contact is present to reduce galling risk.