E-z Lok 240-004-CR 4-40 Unc Flush Threaded Insert Plastic

Product Description

The E-Z LOK 240-004-CR is a flush press fit threaded insert designed for installation into plastic substrates. It provides a durable, load-bearing 4-40 UNC threaded hole in materials that cannot support reliable threads on their own. The insert measures 0.188 inches in overall length with an insert diameter of 0.166 inches. Fabricated from stainless steel, it resists corrosion in demanding environments. Machinists, assembly technicians, and product assemblers press these inserts into a pre-drilled hole to create a permanent, metal-threaded anchor point within plastic housings, enclosures, and structural plastic components.

This insert is suited for light-duty fastening applications in plastic parts where a flush finish is required at the surface. The flush design sits even with the surrounding material surface after installation, making it appropriate for assemblies where a protruding insert would interfere with mating parts or aesthetics. It is commonly used in electronics enclosures, instrument housings, and plastic fabrications requiring a clean, flat surface. Sold in packages of 10 with a minimum order quantity of 1 package.

Key Features

• Flush press fit design installs level with the plastic surface for clean, interference-free assemblies
• 4-40 UNC thread standard compatible with standard 4-40 machine screws and fasteners
• Stainless steel construction provides corrosion resistance in wet or chemically exposed environments
• Requires a 5/32-inch drill size for proper hole preparation prior to press installation
• Compact form factor at 0.188 inches overall length suits thin-wall plastic applications

Compatibility

Designed as a press fit threaded insert for use in plastic substrates requiring 4-40 UNC machine screw threads.

Installation Notes

Installation is performed by pressing the insert into a properly sized pre-drilled hole using an arbor press or similar controlled pressing tool. Ensure the hole diameter matches the specified 5/32-inch drill size before pressing to avoid cracking or deforming the plastic host material. Power down any assembly before installing inserts in electrical or electronic enclosures. Do not use impact methods, as uneven force can misalign the insert or damage the surrounding plastic.