Value Collection 111388PR Set Screw 3/8-16 X 3/8 in Grade 8

Product Description

The VALUE COLLECTION 111388PR is a 3/8-16 x 3/8 inch knurled cup point set screw made from Grade 8 alloy steel. It is designed to secure a shaft, collar, or component inside a bore by biting into the mating surface with its knurled cup point, which provides strong resistance to rotation and axial movement. Drive is a 3/16 inch hex (Allen) socket. Conforms to ASME/ANSI B18.3 and ASTM F912 dimensional and material standards. Suitable for high-load, vibration-prone assemblies where a firm, semi-permanent grip is required. Installed by machinists, millwrights, and maintenance technicians across industrial, HVAC, and mechanical applications.

This set screw is used in applications where a flush or recessed fastener is needed to lock rotating components such as pulleys, gears, sprockets, collars, and hubs onto shafts. The knurled cup point is well suited to softer shaft materials where the knurling can engage the surface and resist back-out under load or vibration. Thread size 3/8-16 UNC is a common specification in light-to-medium industrial machinery and mechanical assemblies. Sold individually per package; minimum order quantity is 100 pieces.

Key Features

• Knurled cup point grips shaft surface to resist rotation and axial movement
• Grade 8 alloy steel construction for high tensile and torsional strength
• 3/8-16 UNC thread for broad compatibility with standard tapped holes
• 3/16 inch hex drive accepts standard Allen or hex key tools
• Meets ASME/ANSI B18.3 and ASTM F912 dimensional and performance standards
• Headless design sits flush or below surface for clearance-sensitive assemblies

Compatibility

Designed as a standard 3/8-16 UNC headless set screw suitable for any tapped hole conforming to ASME/ANSI B18.3 specifications in that thread size.

Installation Notes

Installation is performed with a 3/16 inch hex key or Allen driver; use a torque wrench with a hex bit adapter when a calibrated clamp load is required. Ensure the mating tapped hole is clean and free of debris before threading. De-energize or lock out any rotating machinery before installing or removing set screws per applicable OSHA lockout/tagout procedures. Avoid over-driving, which can shear the drive socket or damage the thread.