Value Collection R63266486 Set Screw 1/4-20 X 1-1/4 in Cup Point

Product Description

The VALUE COLLECTION R63266486 is a 1/4-20 x 1-1/4 inch cup point set screw manufactured from 18-8 stainless steel. Set screws are fully threaded fasteners with no head — they seat flush or below a surface to lock a component, such as a collar, gear, or pulley, onto a shaft. This screw uses a 1/8 inch hex key drive and a UNC thread standard. The cup point bites into the mating surface to resist rotational and axial movement. Installed by mechanical contractors, maintenance technicians, and machinists across HVAC, plumbing, and industrial equipment applications.

This set screw is suited for use in light to medium clamping applications where corrosion resistance is a priority. The 18-8 stainless steel construction makes it appropriate for humid, wet, or mildly corrosive environments found in mechanical rooms, equipment enclosures, and outdoor assemblies. The 1/4-20 UNC thread pitch is one of the most common thread sizes in North American trade work, making this screw a standard replacement or field-stocking fastener for a wide range of equipment.

Key Features

• Cup point geometry bites into shaft surface for reliable axial and rotational holding force
• 18-8 stainless steel construction resists corrosion in humid and wet service environments
• 1/4-20 UNC thread — a widely standardized size across HVAC, plumbing, and mechanical equipment
• 1/8 inch hex key drive for installation with standard Allen wrenches or hex bit drivers
• Headless design seats flush or below surface for clearance-sensitive assemblies

Compatibility

Designed as a standard 1/4-20 x 1-1/4 inch cup point set screw suitable for use wherever a UNC 1/4-20 headless fastener with cup point geometry is specified.

Installation Notes

Install using a 1/8 inch hex key or Allen driver; ensure the key is fully seated before applying torque to avoid rounding the socket. De-energize and lock out any equipment before accessing rotating components such as shafts, collars, or pulleys. Inspect the mating shaft surface for existing cup point impressions and align the screw to the impression when reinstalling to maintain holding integrity. Minimum order quantity for this part is 100 pieces.