Value Collection 581414PR Hex Socket Cap Screw 1/4-28 Unf

Product Description

The VALUE COLLECTION 581414PR is a partially threaded hex socket cap screw engineered for high-strength fastening applications in mechanical assemblies. Manufactured from alloy steel with a black oxide finish, this fastener meets ASME/ANSI B18.3 and ASTM A574 standards, making it suitable for demanding industrial and trade environments. It features a 1/4-28 UNF thread size and a 5-inch length under head, driven by a 3/16-inch hex socket key. The black oxide coating provides a baseline level of corrosion resistance while reducing light reflection on exposed fastener heads. Machinists, millwrights, and maintenance technicians working on precision equipment or structural assemblies are the typical installers.

This cap screw is suited for applications requiring fine-thread engagement, such as machine tool components, fixture plates, hydraulic manifolds, and other assemblies where vibration resistance and precise thread fit are critical. The 1/4-28 UNF thread pitch provides tighter thread engagement than coarse-thread variants, making it preferable in thin-material applications or where repeated removal and reinstallation is expected. The partial threading allows for a smooth shank section to aid in alignment and load transfer through the shank body rather than the threaded portion alone.

Key Features

• Alloy steel construction meets ASTM A574 high-strength cap screw requirements
• Conforms to ASME/ANSI B18.3 dimensional standards for hex socket cap screws
• 1/4-28 UNF fine thread for improved vibration resistance and precise fit
• Partially threaded shank supports shear load transfer and alignment
• Black oxide finish for moderate corrosion resistance and low-glare appearance
• 3/16-inch hex drive for use with standard hex key or socket tools

Compatibility

Designed as an OEM-style replacement or direct-fit fastener for applications requiring a 1/4-28 UNF partially threaded hex socket cap screw with a 5-inch length under head, conforming to ASME/ANSI B18.3 and ASTM A574 standards.

Installation Notes

Installation should be performed by a qualified mechanic, machinist, or maintenance technician using an appropriate 3/16-inch hex key or socket driver. Always de-energize and lock out equipment before fastener replacement in any powered assembly. Do not exceed the rated torque for a 1/4-28 alloy steel cap screw as specified by the equipment manufacturer or applicable industry standards. Inspect the mating threaded hole for damage or contamination before installation to ensure full thread engagement.