Value Collection R40343421 Set Screw 8-32 X 1/4 in Cup Point Ss

Product Description

The VALUE COLLECTION R40343421 is a headless cup point set screw intended for mechanical fastening applications where a flush or recessed installation is required. Threaded 8-32 UNC with an overall length of 1/4 inch, this fastener is driven with a 5/64 inch hex key. Constructed from Grade 18-8 stainless steel, the screw resists corrosion in wet or chemically active environments. The cup point geometry bites into the mating surface to resist rotational and axial movement without requiring a through-hole or protruding fastener head. Electricians, HVAC technicians, and mechanical contractors use set screws like this to lock collars, pulleys, and knobs onto shafts.

Cup point set screws in the 8-32 thread size are commonly used in light mechanical assemblies, HVAC equipment panels, motor shaft collars, and electrical enclosure hardware. The 18-8 stainless steel construction makes this screw suitable for indoor and moderately corrosive outdoor environments. These screws ship in minimum order quantities of 100, making them appropriate for shop stock, service van replenishment, or contractor supply bins where small-hardware inventory is maintained on a regular basis.

Key Features

• 8-32 UNC thread for broad compatibility with standard tapped holes in that size range
• Cup point geometry provides a strong bite on shaft surfaces to resist slippage under load
• Grade 18-8 stainless steel construction resists rust and corrosion without surface coating
• 1/4 inch overall length suits shallow-boss and thin-collar fastening situations
• 5/64 inch hex drive compatible with standard hex key sets and hex-bit drivers
• Headless design allows fully recessed installation flush with or below the mating surface

Compatibility

Designed as a standard UNC 8-32 cup point set screw suitable for use in any tapped 8-32 hole requiring a headless stainless steel fastener with hex drive and cup point geometry.

Installation Notes

Use a properly sized 5/64 inch hex key or hex-bit driver to seat the screw — an undersized or worn driver risks rounding the socket. Ensure the mating shaft or surface is clean and free of debris before tightening so the cup point seats correctly. Power down or de-energize any equipment before accessing fasteners inside electrical or HVAC enclosures. Do not exceed the torque capacity appropriate to the 8-32 thread size and stainless steel material to avoid galling or fastener failure.