Value Collection 440144PR Hex Cap Screw 5/16-24 X 2 in Grade L9

Product Description

The VALUE COLLECTION 440144PR is a partially threaded hex head cap screw designed for high-strength fastening applications in industrial, mechanical, and structural assemblies. Manufactured from Grade L9 alloy steel, this fastener offers superior tensile strength compared to standard Grade 5 or Grade 8 fasteners, making it well-suited for demanding bolted joints subject to high loads or vibration. The 5/16-24 UNF thread form provides fine-thread engagement for applications where precise clamping force and resistance to loosening are required. A zinc yellow dichromate finish provides corrosion resistance and a distinctive yellow identification coating. Licensed mechanics, maintenance technicians, and industrial assemblers are the typical installers.

This cap screw is used in industrial machinery, automotive assemblies, heavy equipment, and precision mechanical systems where a fine-thread, high-strength fastener is specified. The 5/16-24 thread size and 2-inch length under head make it appropriate for medium-depth bolted connections in steel components. Partial threading leaves a smooth shank section near the head, which is standard in applications where shear strength or close-tolerance fit in the grip zone is needed. The 1/2-inch hex key size (across flats) accepts standard hex wrenches and sockets.

Key Features

• Grade L9 alloy steel construction for high tensile strength beyond standard Grade 8 specifications
• 5/16-24 UNF fine-thread form for precise clamping force and vibration resistance
• Partially threaded shank provides full grip-zone shear capacity
• Zinc yellow dichromate finish offers corrosion resistance and easy grade identification
• 1/2-inch hex across flats accepts common sockets and open-end wrenches
• 2-inch length under head suits medium-depth structural and mechanical connections

Compatibility

Designed as an OEM-style or replacement fastener for bolted assemblies specifying a 5/16-24 UNF partially threaded hex head cap screw in Grade L9 alloy steel.

Installation Notes

Installation is performed by qualified mechanics, millwrights, or maintenance technicians using a 1/2-inch hex socket or open-end wrench. Ensure mating threads are clean and free of debris before installation. Follow the torque specifications provided by the equipment or assembly manufacturer for Grade L9 fasteners of this size. Do not substitute this fastener in applications specifying a different grade, thread standard, or thread engagement length without engineering review.