Value Collection 40546 Set Screw 3/8-24 X 1/2 in Grade 8

Product Description

The VALUE COLLECTION 40546 is a 3/8-24 x 1/2 inch knurled cup point set screw manufactured from Grade 8 alloy steel. Set screws of this type are headless fasteners used to lock a component — such as a collar, gear, or pulley — onto a shaft by bearing directly against the shaft surface. The knurled cup point increases grip and bite into the mating surface, reducing slippage under vibration or torque. Drive is a 3/16 inch hex key socket. Thread form is UNF (Unified National Fine), which provides tighter thread engagement than coarse thread in the same diameter. These screws conform to ASME/ANSI B18.3 and ASTM F912 standards.

Knurled cup point set screws in 3/8-24 UNF are commonly used in industrial and mechanical assemblies where positive shaft retention is required. Typical applications include motor shaft collars, conveyor components, HVAC blower wheel hubs, and general mechanical drive assemblies in both commercial and light industrial settings. The Grade 8 alloy steel construction suits applications where higher tensile strength is required compared to standard steel set screws. This package contains 25 pieces, making it practical for stocking or multi-unit installations.

Key Features

• Knurled cup point design bites into shaft surface for increased resistance to rotation and axial movement
• Grade 8 alloy steel construction provides high tensile strength for demanding mechanical applications
• 3/8-24 UNF thread offers finer thread pitch for greater clamping force and precision adjustment
• 3/16 inch hex key drive for standard Allen wrench installation
• Conforms to ASME/ANSI B18.3 and ASTM F912 fastener standards
• Sold in a 25-piece package suitable for stocking or batch installation work

Compatibility

Designed as a standard UNF set screw for use in any threaded hole or component accepting a 3/8-24 thread with ASME/ANSI B18.3 dimensional compliance.

Installation Notes

Installation is performed with a 3/16 inch hex key (Allen wrench). Ensure the mating threaded bore is clean and free of debris before driving the screw to seating. De-energize and lock out any rotating equipment before accessing shaft-mounted components. Do not exceed the torque rating of the threaded bore material, particularly when installing into aluminum or soft alloy housings.