Value Collection BT-1428-250-AS Set Screw 1/4-28

Product Description

The VALUE COLLECTION BT-1428-250-AS is a 1/4-28 threaded set screw with a soft tip point configuration, manufactured from Grade 8 alloy steel with a brass tip insert. Set screws of this type are headless fasteners used to secure a component — such as a collar, pulley, or gear — against a shaft or within a bore. The brass tip protects the mating surface from damage while maintaining holding force. The hex drive socket accepts a standard hex key for installation and removal. This fastener is commonly installed by millwrights, pipefitters, HVAC technicians, and maintenance mechanics working on rotating equipment and mechanical assemblies.

This set screw is suited for applications where surface protection of the mating part is a priority. The soft brass tip deforms slightly under load, conforming to the shaft surface and reducing the risk of scoring or marring. Typical applications include shaft collars on blower assemblies, fan hubs, pump couplings, and mechanical drives found in commercial and residential HVAC systems, plumbing equipment, and general industrial machinery. The 1/4-28 UNF thread standard ensures compatibility with fine-thread tapped holes in precision assemblies.

Key Features

• Grade 8 alloy steel body for high tensile and torsional strength
• Brass soft tip protects mating shaft surfaces from scoring during installation
• Hex drive socket accepts standard hex keys for installation in tight clearances
• 1/4-28 UNF fine thread for precise engagement and vibration resistance
• 1/4-inch thread engagement length suitable for shallow tapped bosses and collars
• Headless profile allows flush or below-flush installation in threaded bores

Compatibility

Designed as a standard 1/4-28 UNF soft-tip set screw for use in any tapped bore conforming to the UNF 1/4-28 thread standard where a brass-tipped, hex-drive headless fastener is specified.

Installation Notes

Installation is performed with a hex key of the appropriate size; verify the driver fits the socket cleanly before applying torque to avoid rounding. Ensure the tapped hole is clean and free of debris before threading the screw in by hand. Power down or de-energize any rotating equipment completely before servicing shaft-mounted components secured by set screws. Follow applicable ANSI and equipment manufacturer guidelines for fastener seating in mechanical assemblies.