Value Collection MP40381 Set Screw 5/16-18 X 1 in Grade 8

Product Description

The VALUE COLLECTION MP40381 is a cup point set screw designed for mechanical assemblies requiring a secure, non-protruding fastener. Sized at 5/16-18 UNC thread by 1 inch overall length, this screw is manufactured from Grade 8 alloy steel, delivering high tensile and torsional strength suited for heavy-duty clamping and locking applications. The cup point tip bites into the mating surface to resist rotation and axial movement. Driven by a 5/32-inch hex key, it conforms to ASME/ANSI B18.3 and ASTM F912 standards. Each package contains 50 pieces, making it practical for shop stock or job-site use.

Cup point set screws in the 5/16-18 thread class are widely used across industrial, HVAC, plumbing, and mechanical trades. Common applications include securing collars, hubs, pulleys, gears, and shaft-mounted components where flush installation is required. Grade 8 alloy steel construction makes this fastener appropriate for assemblies subject to vibration, high clamping loads, or torque transfer. Installers working on fan assemblies, motor shaft collars, and valve actuator linkages regularly specify this fastener size and point type.

Key Features

• 5/16-18 UNC thread with 1 inch overall length for precise fit in standard threaded assemblies
• Cup point geometry bites into shaft surface to resist rotation and axial displacement
• Grade 8 alloy steel construction provides high tensile and torsional strength
• 5/32-inch hex drive for compatibility with standard hex keys and L-wrenches
• Meets ASME/ANSI B18.3 and ASTM F912 fastener standards
• Packaged in quantities of 50 for shop stock and repetitive-use applications

Compatibility

Designed as a standard ASME/ANSI B18.3 hex socket cup point set screw for any threaded application accepting a 5/16-18 UNC fastener with 1 inch overall length.

Installation Notes

Set screws should be installed by a qualified mechanic or tradesperson using a calibrated 5/32-inch hex key or Allen driver. Always de-energize and lock out equipment before accessing rotating shafts or assemblies. Thread the screw by hand before applying drive torque to avoid cross-threading. Inspect the seating surface and mating threads for damage or contamination prior to installation.