Electro Hardware HHCS-516-750-N Hex Head Cap Screw Nylon

Product Description

The ELECTRO HARDWARE HHCS-516-750-N is a fully threaded hex head cap screw designed for applications where non-metallic fasteners are required. It is manufactured from Grade 6/6 nylon and carries an uncoated finish. The thread pattern is 5/16-18 UNC with a length under head of 3/4 inches. This fastener meets ASTM D789-66 Type 1 GDE2 standards, making it suitable for installations where corrosion resistance, electrical non-conductivity, or weight reduction are priorities. It is installed by electricians, HVAC technicians, plumbers, and general trade professionals working in environments where metal fasteners are not appropriate.

This screw is used in residential and light commercial installations where plastic fasteners are preferred over steel. Common applications include enclosure assembly, panel mounting, electrical equipment, and corrosive or wet environments where metal fasteners would degrade. The 5/16-18 UNC thread and 3/4-inch length under head make it a versatile fastener for moderate-load, non-structural connections. It is sold in packages of 100 units with a minimum order quantity of 1 package.

Key Features

• Grade 6/6 nylon construction provides corrosion resistance and electrical non-conductivity
• Fully threaded 5/16-18 UNC thread pattern for consistent fastener engagement
• 3/4 inch length under head suits standard panel and enclosure mounting depths
• Uncoated finish eliminates contamination risk in sensitive environments
• Meets ASTM D789-66 Type 1 GDE2 standard for nylon material quality
• Packaged in quantities of 100 with a minimum order quantity of 1 package

Compatibility

Designed as an OEM-style replacement or direct-use fastener for applications requiring 5/16-18 UNC fully threaded hex head cap screws in Grade 6/6 nylon.

Installation Notes

Install using a standard hex driver or wrench sized for a 5/16-18 fastener. Nylon fasteners have lower tensile and torque tolerances than metal equivalents - do not overtighten, as cross-threading or shear failure can occur. Power down or de-energize any electrical equipment before servicing fasteners in live enclosures. Follow applicable NEC or equipment manufacturer guidelines for fastener material selection in electrical assemblies.