Value Collection 88547427 Cup Point Set Screw 1/4-28 Pack 25

Product Description

The VALUE COLLECTION 88547427 is a Grade 8 steel cup point set screw designed for secure, tamper-resistant fastening in mechanical assemblies. Threaded 1/4-28 UNF with an overall length of 1/4 inch, this screw is driven by a 1/8 inch hex key and features a hardened cup point that bites into mating surfaces to resist rotation and axial movement under load. The black oxide finish provides mild corrosion resistance and reduces light reflection in finished assemblies. Each package contains 25 pieces, making it practical for shop stock or job-lot purchasing. Licensed trades and maintenance professionals working with precision mechanical assemblies rely on this grade for its tensile strength and consistent dimensional tolerances.

Cup point set screws are widely used in shaft-to-hub connections, collars, pulleys, and mechanical stop applications across HVAC equipment, electrical motor assemblies, pump shafts, and general industrial machinery. The 1/4-28 UNF thread is a fine-thread specification suited to applications where vibration resistance and fine adjustment are priorities. This fastener is appropriate for both OEM assembly and field service repair work across residential and light commercial mechanical systems.

Key Features

• Grade 8 steel construction for high tensile and proof load strength
• Cup point geometry grips mating shaft or surface to resist loosening under vibration
• 1/4-28 UNF fine-thread specification for precise adjustment and vibration resistance
• 1/8 inch hex drive for standard Allen key installation in tight clearances
• Black oxide finish for mild corrosion protection and low-glare appearance
• Sold in a 25-piece package for efficient shop stocking

Compatibility

Designed as a standard 1/4-28 UNF cup point set screw suitable for shaft collars, hubs, pulleys, and mechanical stop applications requiring a Grade 8 fastener with a 1/8 inch hex drive.

Installation Notes

Installation is performed with a 1/8 inch hex key or Allen wrench; ensure the key is fully seated before applying torque to avoid rounding the drive socket. De-energize or lock out any rotating equipment before servicing shaft-collar connections. Verify thread engagement depth and mating material hardness are appropriate for the cup point to properly seat without stripping. Follow applicable mechanical codes and equipment manufacturer service procedures when replacing fasteners in load-bearing or rotating assemblies.