E-z Lok 400-624 Brass Knife Insert 3/8-24 10-pack

Product Description

The E-Z LOK 400-624 is a brass knife-style threaded insert designed to install permanent 3/8-24 internal threads into soft materials such as wood, plastic, and composite substrates. The knife insert uses a serrated outer profile to cut into the base material as it is driven, locking in place without adhesive. At 0.625 inches in length with a 0.6-inch insert diameter, this insert provides a clean, load-bearing threaded anchor point in applications where a standard tapped hole would strip or fail. Installation requires a 0.5-inch drill hole. Licensed tradespeople and maintenance professionals use these inserts in wood-frame assemblies, cabinetry, furniture, and light structural fixtures where reliable thread engagement is critical.

The 400-624 is suited for residential and light commercial applications involving wood, particleboard, hard plastics, and similar materials. A minimum grip depth of 0.75 inches is required to achieve full mechanical engagement in the host material. This insert is appropriate wherever a durable brass threaded anchor is needed without permanent adhesive bonding. Each package contains 10 inserts, making it practical for small-batch production runs or service calls requiring multiple fastener points in a single assembly.

Key Features

• 3/8-24 internal thread for standard inch-series fastener compatibility
• Brass construction resists corrosion and provides smooth thread engagement
• Knife-style serrated outer profile cuts into soft materials during installation
• 0.625-inch overall length fits shallow material thicknesses with 0.75-inch minimum grip
• Installs into a 0.5-inch diameter drilled hole with no adhesive required
• Sold in a 10-piece pack to support small runs and service work

Compatibility

Designed as an OEM-style threaded insert for use in wood, particleboard, hard plastics, and similar soft or semi-rigid substrates requiring a permanent 3/8-24 internal thread anchor.

Installation Notes

Installation is performed by drilling a 0.5-inch diameter pilot hole to the required depth before driving the insert. Use an appropriate installation tool or hex key to drive the knife insert flush or just below the surface of the host material. Verify the host material meets the 0.75-inch minimum grip requirement to ensure full thread engagement. Power down any assembly or fixture before adding fastener points to avoid movement during installation.