E-z Lok DV-420-TH Brass Threaded Insert 1/4-20 Unc 50-pack

Product Description

The E-Z LOK DV-420-TH is a brass double vane tapered hole threaded insert designed to create durable 1/4-20 UNC threaded connections in plastic substrates. The tapered hole design, with a small end hole diameter of 0.321 inches and a large end hole diameter of 0.363 inches, allows the insert to be driven or pressed into a pre-drilled tapered hole. The double vane geometry locks the insert in place and resists both pull-out and rotational forces. Overall length is 0.500 inches with a pilot diameter of 0.332 inches. This insert is installed by assembly technicians, maintenance professionals, and trade workers who need reliable thread repair or thread creation in plastic components.

The DV-420-TH is intended for use in plastic materials where a permanent, load-bearing threaded hole is required. Typical applications include enclosures, housings, fixtures, and structural plastic assemblies found in HVAC equipment, electrical panel components, and pool equipment. Each package contains 50 inserts, making this part well suited for production runs or service kits where multiple installations are needed at one time. The 11/32-inch drill size required for installation is a standard fractional drill bit size readily available in most shop or field kits.

Key Features

• 1/4-20 UNC thread for compatibility with standard inch-series fasteners
• Tapered hole design with 0.321-inch small end and 0.363-inch large end hole diameters for positive mechanical lock in plastic
• Double vane geometry resists pull-out and rotation after installation
• Brass construction provides corrosion resistance and good thread durability
• 0.500-inch overall length with 0.194-inch minimum wall thickness requirement
• Requires 11/32-inch drill - a common fractional size for field and shop use
• Package quantity of 50 units per pack, minimum order quantity of 1 pack

Compatibility

Designed for installation into plastic materials using a tapered pre-drilled hole. Consult E-Z LOK installation guidelines to confirm suitability for your specific plastic type and wall thickness before installation.

Installation Notes

Installation is typically performed by assembly technicians or service professionals using a standard drill press or hand drill with an 11/32-inch bit to create the tapered pilot hole. Ensure minimum wall thickness of 0.194 inches is present at the installation site before proceeding. The insert should be driven or pressed squarely into the hole to prevent cross-threading or damage to the surrounding material. Follow the manufacturer's installation tooling recommendations for consistent seating depth across production or repair applications.