Value Collection 40548 Set Screw 3/8-24 X 1 in Grade 8 25 Pack

Product Description

The VALUE COLLECTION 40548 is a 3/8-24 x 1 inch knurled cup point set screw manufactured from Grade 8 alloy steel for high-strength fastening applications. The knurled cup point bites into mating surfaces to resist rotation and axial movement without requiring a through-hole or protruding head. Drive is a 3/16 inch hex key socket. These set screws conform to ASME/ANSI B18.3 and ASTM F912 standards, making them appropriate for use in precision mechanical assemblies where holding force and dimensional consistency matter. Each package contains 25 pieces.

Knurled cup point set screws are commonly used in collars, pulleys, sprockets, and shaft assemblies across HVAC equipment, pumps, fan blades, and general mechanical components. The 3/8-24 UNF thread provides a finer pitch than coarse-series fasteners, offering greater resistance to loosening under vibration. This makes them well suited for rotating equipment and motor shaft applications where set screws see dynamic loads during operation.

Key Features

• Knurled cup point design grips mating surfaces firmly to resist rotation and axial slip
• Grade 8 alloy steel construction provides high tensile and proof load strength
• 3/8-24 UNF thread for finer pitch and improved vibration resistance versus coarse thread
• 3/16 inch hex key drive for installation with standard Allen wrenches
• Conforms to ASME/ANSI B18.3 and ASTM F912 dimensional and material standards
• Sold in a 25-piece package for shop or field stocking

Compatibility

Designed as a standard 3/8-24 UNF set screw for use in any collar, hub, pulley, or shaft assembly machined to accept a 3/8-24 threaded set screw port.

Installation Notes

Install with a properly sized 3/16 inch hex key to avoid rounding the drive socket. Ensure the shaft and bore surfaces are clean and free of debris before seating the knurled cup point. De-energize and lock out any rotating equipment before servicing set screws on motor shafts or drive components. Follow applicable mechanical and equipment manufacturer torque guidelines for the specific assembly.