Value Collection 88547435 Set Screw 1/4-28 X 3/8 in Cup Point Gr8

Product Description

The VALUE COLLECTION 88547435 is a 1/4-28 UNF cup point set screw designed for secure, flush fastening in mechanical assemblies. Manufactured from Grade 8 steel with a black oxide finish, this headless screw seats fully within a threaded bore to lock shafts, collars, and other components without protruding above the surface. The cup point geometry bites into the mating surface for positive holding force under vibration or rotational load. Driven by a 1/8 inch hex key, it is well suited for tight-access installations where a standard cap screw head would interfere. Each package contains 25 pieces.

These set screws are used across a wide range of trade and industrial applications, including HVAC equipment assemblies, motor shaft collars, pulley and sprocket retention, and general mechanical maintenance. The 1/4-28 fine thread provides higher thread engagement per unit length compared to coarse thread, making it appropriate for thin-walled hubs or applications where precise torque control is needed. Licensed technicians and maintenance mechanics routinely use this screw type during equipment service and assembly work.

Key Features

• 1/4-28 UNF fine thread for high thread engagement in thin-walled components
• Cup point geometry bites into mating surface for strong rotational and axial holding force
• Grade 8 steel construction for high tensile and proof-load strength
• Black oxide finish provides mild corrosion resistance and reduces light reflection
• 1/8 inch hex drive allows installation in confined spaces with a standard hex key or Allen wrench
• Sold in a 25-piece package, suitable for stocking or multi-unit service calls

Compatibility

Designed as a standard 1/4-28 UNF cup point set screw suitable for use in any threaded bore conforming to that thread specification where a Grade 8 steel, black oxide, headless cup point fastener is required.

Installation Notes

Installation is performed by threading the screw into a pre-tapped 1/4-28 UNF bore using a 1/8 inch hex key. Always de-energize and lock out equipment before servicing any assembly that requires removing or replacing set screws on rotating components. Do not overtighten, as Grade 8 fasteners in small diameters can shear if torque is applied beyond the fastener rating. Follow applicable machinery manufacturer guidelines and relevant ANSI or ASME fastener standards for proper installation procedure.