Value Collection MP40486 Set Screw 3/8-24 X 3/8 in Grade 8

Product Description

The VALUE COLLECTION MP40486 is a cup point set screw designed for secure, no-slip fastening in mechanical assemblies where a headless profile is required. Manufactured from Grade 8 alloy steel, this screw meets ASME/ANSI B18.3 and ASTM F912 standards, making it appropriate for high-stress industrial and trade applications. The 3/8-24 UNF thread provides fine-pitch engagement for precise torque control and resistance to vibration loosening. At 3/8 inches in overall length, the fastener is well-suited for compact clamping setups. Sold in a package quantity of 25, this part is a practical stock item for shops and field technicians alike.

This set screw is commonly used to lock hubs, collars, pulleys, and gears onto shafts in mechanical drive systems. The cup point geometry bites into the shaft surface to resist rotation and axial movement without requiring a protruding head. Applications span HVAC equipment assemblies, pump and motor shaft retention, plumbing valve actuators, and general industrial machinery maintenance. It is installed by machinists, millwrights, HVAC technicians, and general maintenance professionals working on rotating or sliding shaft components.

Key Features

• Cup point geometry provides positive shaft engagement and resists axial and rotational movement
• Grade 8 alloy steel construction delivers high tensile and shear strength
• 3/8-24 UNF fine-thread form for precise clamping force and vibration resistance
• 3/16-inch hex drive accepts standard hex key or Allen wrench tooling
• Conforms to ASME/ANSI B18.3 and ASTM F912 fastener standards
• Headless design allows flush or sub-flush seating in the mating component

Compatibility

Designed as a standard 3/8-24 UNF cup point set screw suitable for use in any application requiring ASME/ANSI B18.3 or ASTM F912 compliant headless fasteners with a 3/16-inch hex drive.

Installation Notes

Power down or de-energize all equipment before disassembling shaft assemblies or replacing fasteners on rotating components. Use the correct 3/16-inch hex key to avoid rounding the drive socket. Tighten to the assembly manufacturer's specified torque for the shaft diameter and material involved. Inspect the cup point and shaft seating surface for wear before reinstalling in critical load-bearing applications.