Value Collection 409070PR Set Screw 3/8-16 X 3/4 in Cup Point

Product Description

The VALUE COLLECTION 409070PR is a 3/8-16 x 3/4 inch cup point set screw manufactured from Grade 2 steel with a bright, uncoated finish. Set screws are headless fasteners that thread fully into a tapped hole and bear directly against a mating surface to secure collars, gears, pulleys, and hubs to shafts. The cup point geometry bites into the shaft surface to resist rotational and axial movement. This screw follows Unified National Coarse (UNC) thread standards and is measured as length under head, which for a headless fastener equals the full body length of 3/4 inch. Installation is handled by machinists, millwrights, HVAC technicians, and general maintenance trades.

Cup point set screws in the 3/8-16 size are widely used in light to medium industrial and mechanical applications. Common installations include shaft collars on fan and blower assemblies, motor shaft couplings, and pulley retention on belt-driven equipment. The Grade 2 steel construction suits standard-load applications where high-alloy hardened fasteners are not required. The uncoated finish is appropriate for indoor or protected environments. Sold individually with a minimum order quantity of 100 pieces, making this part suitable for maintenance stock or production assembly use.

Key Features

• Cup point tip bites into shaft material to resist rotation and axial movement
• 3/8-16 UNC thread provides broad compatibility with standard tapped holes
• Full 3/4 inch engagement length for secure clamping force
• Grade 2 steel construction suitable for standard-load mechanical assemblies
• Bright uncoated finish for use in dry or protected indoor environments
• Headless design sits flush or below surface to eliminate protrusion hazards

Compatibility

Designed as a standard UNC-thread replacement or stock set screw for any application requiring a 3/8-16 x 3/4 inch cup point headless fastener.

Installation Notes

Installation requires a square drive key or bit sized for the socket recess. De-energize and lock out any machinery before accessing shaft assemblies. Tighten to the assembly specification for Grade 2 steel fasteners using a calibrated torque tool when a specific value is called out in the equipment service manual. Avoid over-torquing, which can strip threads or deform the cup point beyond usable engagement.