Value Collection R40324403 Set Screw 1/4-20 X 1/2 in Cup Point

Product Description

The VALUE COLLECTION R40324403 is a 1/4-20 x 1/2 inch cup point set screw machined from Grade 18-8 stainless steel. It is driven by a 1/8 inch hex key and features a unified national coarse (UNC) thread standard. The cup point bites into shaft material to resist axial and rotational movement, making it a reliable choice for securing collars, pulleys, gears, and similar components. Machinists, millwrights, and maintenance technicians reach for this fastener when corrosion resistance and a firm hold are both required. The stainless construction resists rust in wet or chemically active environments without sacrificing clamping force.

This set screw is used across a wide range of industrial and mechanical applications including HVAC equipment assemblies, pump shafts, motor couplings, and general machine component retention. It is suited for both light-duty and moderate-load applications where a flush or below-surface installation is required. The 1/4-20 UNC thread makes it compatible with standard tapped holes found in common off-the-shelf hardware and fabricated assemblies alike. Sold individually with a minimum order quantity of 100 pieces.

Key Features

• Cup point geometry grips shaft surfaces to prevent slipping under load
• Grade 18-8 stainless steel construction resists corrosion in wet and outdoor environments
• 1/4-20 UNC thread for compatibility with standard tapped holes
• 1/8 inch hex drive for use with standard Allen wrenches or hex keys
• Overall length of 1/2 inch suits shallow-bore and space-constrained installations

Compatibility

Designed as a standard 1/4-20 UNC cup point set screw suitable for any tapped bore accepting that thread size and requiring a hex drive fastener.

Installation Notes

Install using a calibrated 1/8 inch hex key or Allen wrench. De-energize and lock out any rotating equipment before installing or removing set screws. Ensure the tapped hole is clean and free of debris before threading to avoid cross-threading or galling, which is a particular concern with stainless fasteners. Do not use impact tools, as they can damage the hex socket or over-torque the screw.