Value Collection 440640BR Hex Cap Screw 3/4-16 X 6 in Grade L9

Product Description

The VALUE COLLECTION 440640BR is a partially threaded hex head cap screw engineered for high-strength bolted connections in industrial and mechanical applications. Manufactured from Grade L9 alloy steel, this fastener delivers superior tensile strength and fatigue resistance compared to standard Grade 8 hardware. The zinc yellow dichromate finish provides a corrosion-resistant barrier suitable for demanding service environments. Sized at 3/4-16 UNF thread with a 6-inch length under head, the 440640BR is driven with a 1-1/8-inch hex key or wrench. Licensed mechanics, millwrights, pipefitters, and maintenance technicians routinely specify L9-grade fasteners where vibration resistance and clamp load retention are critical.

This screw is suited for heavy equipment assembly, hydraulic system mounting, structural mechanical joints, and OEM replacement applications where fine-thread engagement and high clamping force are required. The UNF thread form provides greater thread engagement per inch than coarse-thread UNC, making it a preferred choice on softer substrates or where precise torque control matters. Partial threading allows for shank bearing load in clearance-hole applications.

Key Features

• Grade L9 alloy steel construction for high tensile and fatigue strength
• 3/4-16 UNF thread — fine pitch for increased clamp load and vibration resistance
• 6-inch length under head with partial threading for shank load-bearing capability
• Zinc yellow dichromate finish for corrosion protection
• 1-1/8-inch hex drive compatible with standard hex wrenches and impact sockets
• Inch measurement system, length measured under head per standard convention

Compatibility

Designed as a general-purpose replacement or OEM-style fastener for applications requiring 3/4-16 UNF partially threaded hex head cap screws in Grade L9 alloy steel.

Installation Notes

Installation should be performed by a qualified mechanic or maintenance technician familiar with high-strength fastener procedures. Always degrease mating threads and bearing surfaces before installation to achieve accurate torque readings. Do not substitute a lower-grade fastener in any joint designed for L9-rated hardware. Follow applicable equipment OEM torque specifications and relevant industry standards for the specific assembly.