Value Collection R63260440 Set Screw 4-40 Cup Point Ss 18-8

Product Description

The VALUE COLLECTION R63260440 is a 4-40 UNC cup point set screw manufactured from grade 18-8 stainless steel. Set screws are fully threaded, headless fasteners used to lock a component - such as a collar, gear, or pulley - onto a shaft by bearing down through the mating part. The cup point geometry creates a small indentation in the shaft surface for positive, repeatable positioning. At 3/4 inches in overall length with a 0.050-inch hex drive, this screw is sized for light-duty mechanical assemblies where corrosion resistance and compact fastening are priorities. Installation requires a 0.050-inch hex key.

This set screw is suited for use in mechanical, HVAC, electrical, and industrial applications where a stainless steel fastener is needed to resist corrosion in humid or wet environments. Common install scenarios include shaft collars on fan assemblies, motor couplings, and small-diameter rotating components found in commercial and residential equipment. The 4-40 thread size is standard for light-gauge assemblies and instrumentation hardware. This SKU is sold individually but carries a minimum order quantity of 100 units, making it appropriate for shop stock, service van inventory, or production use.

Key Features

• Cup point tip creates a positive seat on the shaft surface for secure, repeatable locking
• Grade 18-8 stainless steel construction resists corrosion in humid and wet service environments
• 4-40 UNC thread standard ensures compatibility with common light-duty tapped assemblies
• 0.050-inch hex drive for use with standard hex keys or T-handle drivers
• 3/4-inch overall length provides sufficient thread engagement for typical collar and coupling applications
• Headless design sits flush or below the surface of the mating part, eliminating snag points

Compatibility

Designed as a standard 4-40 UNC cup point set screw for use in any assembly requiring a 4-40 tapped hole and an 18-8 stainless steel fastener.

Installation Notes

Set screws are installed by mechanical technicians and assemblers using a 0.050-inch hex key. De-energize or lock out any equipment before accessing rotating shaft assemblies. Tighten to hand-snug plus a controlled turn as appropriate for the assembly - do not overtighten, as 4-40 threads are susceptible to galling in stainless steel; applying an appropriate anti-seize compound is a common practice. Ensure the mating tapped hole is clean and free of debris before installation.