Value Collection 440628BR Hex Cap Screw 3/4-16 X 3-1/2 in L9

Product Description

The VALUE COLLECTION 440628BR is a partially threaded hex head cap screw manufactured from Grade L9 steel with a zinc yellow dichromate finish. It is sized at 3/4-16 UNF thread with a 3-1/2-inch length under the head, placing it in the high-strength fastener category used across heavy-duty mechanical assemblies. Grade L9 alloy steel delivers elevated proof load and tensile strength over standard Grade 5 or Grade 8 hardware, making it appropriate for applications that demand a reliable, fatigue-resistant fastener. The zinc yellow dichromate coating provides corrosion resistance and is visually distinct from uncoated hardware on the job.

This screw suits industrial, agricultural, and heavy equipment assembly work where a 3/4-inch coarse-fine UNF thread pattern is specified. It is a common fastener choice for drivetrain components, suspension assemblies, hydraulic equipment mounts, and structural machine frames. The partial threading allows the unthreaded shank to bear shear loads across the joint, which is a standard design requirement in dynamic load applications. Millwrights, heavy equipment technicians, and industrial maintenance mechanics regularly work with this fastener class.

Key Features

• Grade L9 alloy steel construction for high proof load and tensile strength
• 3/4-16 UNF thread provides fine-pitch engagement for controlled clamp load
• Partial threading allows unthreaded shank to carry shear loads
• Zinc yellow dichromate finish provides corrosion resistance and part identification
• 1-1/8 inch hex key size for standard wrench drive
• Inch measurement system, length measured under the head

Compatibility

Designed for use in any application specifying a 3/4-16 UNF partially threaded hex head cap screw in Grade L9 alloy steel. Confirm thread engagement depth and grip length against assembly drawings before installation.

Installation Notes

Installation should be performed by a qualified mechanic or millwright familiar with high-strength fastener torque procedures per applicable machinery or equipment service documentation. Always verify mating thread condition and lubrication requirements before assembly, as Grade L9 fasteners are typically installed to a specific clamp load defined by the equipment manufacturer. Do not substitute a lower-grade fastener in a Grade L9 application. Refer to ASME or SAE torque tables for the appropriate target value when equipment documentation is unavailable.