Value Collection 440518BR Hex Cap Screw 5/8-11 X 7 in Grade L9

Product Description

The VALUE COLLECTION 440518BR is a partially threaded hex head cap screw designed for high-strength fastening applications in industrial, mechanical, and structural assemblies. Manufactured from Grade L9 steel with a zinc yellow dichromate finish, this fastener delivers elevated tensile strength and corrosion resistance in demanding service environments. The 5/8-11 UNC thread pattern and 7-inch length under head make it well suited for heavy-duty bolted connections where clamp load and fatigue resistance are critical. Licensed HVAC, plumbing, and mechanical contractors as well as millwrights and maintenance technicians commonly specify L9-grade fasteners when standard Grade 5 or Grade 8 hardware does not meet load requirements.

This cap screw is used in applications where a partially threaded shank is required to bear shear loads across a joint interface while the threaded portion engages the nut or tapped hole. Typical installations include equipment mounting, structural steel connections, pump and compressor assemblies, and mechanical bracket fabrication. The UNC 5/8-11 thread form is the standard inch-series coarse thread for this diameter, making replacement hardware straightforward to source. The zinc yellow dichromate finish provides a base level of corrosion protection suitable for indoor and sheltered outdoor environments.

Key Features

• Grade L9 steel construction for high tensile and fatigue strength beyond standard Grade 8
• Zinc yellow dichromate finish provides corrosion resistance and easy visual identification
• Partially threaded shank allows the unthreaded body to carry shear loads across mating joint surfaces
• 5/8-11 UNC thread standard ensures broad compatibility with inch-series nuts and tapped components
• 15/16-inch hex key drive fits standard combination and impact wrenches
• 7-inch length under head accommodates thick stack-ups and long-reach fastening applications

Compatibility

Designed as an OEM-style replacement or direct-install fastener for any application requiring a 5/8-11 UNC partially threaded hex head cap screw in Grade L9 steel.

Installation Notes

Installation should be performed by a qualified mechanic, millwright, or journeyman tradesperson familiar with high-strength fastener procedures. Always verify that the mating nut or tapped hole is rated for the L9 grade clamp load before assembly. Refer to applicable structural or mechanical codes for required torque values, as no torque specification is provided with this fastener listing. Inspect threads for damage before installation and ensure mating surfaces are clean and free of debris.