Value Collection 601274PR Set Screw 3/8-16 X 2-1/4 in Cup Point

Product Description

The VALUE COLLECTION 601274PR is a cup point set screw designed for secure, no-protrusion fastening in mechanical assemblies. Sized at 3/8-16 (UNC thread) with an overall length of 2.25 inches, it uses a 3/16-inch hex drive for installation with a standard hex key or Allen wrench. The cup point geometry bites into the mating shaft to resist rotation and axial movement without requiring a through-hole. Manufactured from alloy steel, this screw delivers the hardness needed for demanding clamping and locking applications in industrial and mechanical maintenance environments. Licensed trades and maintenance technicians in HVAC, electrical, and plumbing equipment service routinely use set screws of this type when securing collars, hubs, and pulleys.

This set screw is suited for use in mechanical shaft-collar assemblies, pulley and sprocket retention, and equipment with rotating components where a flush fastener is required. The 3/8-16 UNC thread is one of the most common coarse-thread sizes in North American mechanical equipment, making this screw a practical stock item for any service tech or maintenance shop working on motors, fan assemblies, blower wheels, or general mechanical hardware. It conforms to ASME/ANSI B18.3 and ASTM F912 standards, confirming dimensional and mechanical compliance for professional installation use.

Key Features

• Cup point tip bites into mating shaft surface for strong rotational and axial holding force
• 3/8-16 UNC coarse thread for wide compatibility with standard tapped holes
• Overall length of 2.25 inches provides deep thread engagement in thick hubs or collars
• 3/16-inch hex drive accepts standard Allen keys and hex-bit drivers
• Alloy steel construction for high hardness and shear resistance
• Meets ASME/ANSI B18.3 and ASTM F912 dimensional and mechanical standards

Compatibility

Designed as a standard UNC set screw for use in any tapped 3/8-16 hole requiring a cup point, headless fastener per ASME/ANSI B18.3 specification.

Installation Notes

Set screws are installed and removed with a 3/16-inch hex key. Always ensure the mating shaft and tapped hole are clean and free of debris before installation. De-energize and lock out any motor or rotating equipment before servicing set screws on pulleys, collars, or hubs. Do not overtighten; follow the equipment manufacturer torque guidance where provided, as alloy set screws can strip the tapped hole if over-driven.