Value Collection R40321424 Set Screw 5/16-18 Cup Point Ss

Product Description

The VALUE COLLECTION R40321424 is a cup point set screw designed for mechanical fastening applications where a headless, flush-mount profile is required. Sized at 5/16-18 UNC thread with an overall length of 5/16 inches, this screw is driven with a 3/32-inch hex key and seats with a hardened cup point that bites into the mating surface to resist rotation and axial movement. Constructed from grade 18-8 stainless steel, it offers solid corrosion resistance for both indoor and outdoor assemblies. Maintenance technicians, millwrights, and mechanical contractors regularly spec this fastener type for collars, pulleys, shafts, and set-screw hubs across HVAC, plumbing, and light industrial equipment.

This set screw is suited for use in residential and light commercial mechanical assemblies where a compact, low-profile fastener is needed to secure rotating or stationary components to a shaft or housing. Typical applications include motor shaft collars, fan hubs, sheaves, and coupling assemblies. The UNC thread form is the standard for inch-series fastener applications across trade and industrial work. Sold individually with a minimum order quantity of 100 pieces, making it appropriate for shop stock or service-van inventory replenishment.

Key Features

• Cup point tip bites into the mating shaft surface to resist slippage under load
• Grade 18-8 stainless steel construction provides corrosion resistance in wet or humid environments
• 5/16-18 UNC thread is the standard inch-series coarse thread for broad tool compatibility
• 3/32-inch hex drive allows access in tight clearances where a headed fastener will not fit
• Headless profile sits flush or below the surface, reducing snagging hazards on rotating assemblies
• Minimum order quantity of 100 units supports bulk shop-stock and service inventory needs

Compatibility

Designed as a standard inch-series set screw for use in any mechanical assembly accepting a 5/16-18 UNC threaded set screw socket with a cup point seating surface.

Installation Notes

Installation requires a 3/32-inch hex key or Allen driver. De-energize and lock out any equipment before accessing shaft collars or rotating assemblies in accordance with applicable OSHA lockout/tagout procedures. Do not overtighten, as excessive torque can damage the mating shaft surface or strip the internal hex socket. Confirm thread engagement depth meets the assembly manufacturer's specification before returning equipment to service.