Electro Hardware EF-0420-5 Captive Nut 1/4-20 Hex Head 10-pack

Product Description

The ELECTRO HARDWARE EF-0420-5 is a flush mount captive nut designed for secure, tool-accessible fastening in sheet metal panels and enclosures. It features a 1/4-20 thread size and a low-profile hex head that sits flush with the panel surface after installation. The body diameter measures 0.343 inches and the mounting hole diameter is 0.344 inches, requiring a closely toleranced hole for a firm press fit. Constructed from 18-8 passivated stainless steel, this captive nut resists corrosion in demanding environments. HVAC technicians, electricians, and panel fabricators use this hardware when a threaded fastening point must remain captured in the panel without backing access.

This captive nut is suited for installation in sheet metal panels, electrical enclosures, HVAC equipment cabinets, and control boxes where a minimum panel thickness of 0.187 inches is present. The hex head profile resists rotation during bolt engagement, eliminating the need for a secondary tool to hold the nut. It is sold in a package of 10 units, making it practical for service trucks, panel shops, and light assembly work requiring small quantities of precision fasteners.

Key Features

• 1/4-20 thread size for standard bolt compatibility
• Hex head design prevents rotation during fastening without rear access
• Flush mount profile keeps the panel surface clean and unobstructed
• 18-8 passivated stainless steel construction for corrosion resistance
• Minimum panel thickness of 0.187 inches accommodates common sheet metal gauges
• Sold in a pack of 10 units for small-quantity service and repair needs

Compatibility

Designed as an OEM-style replacement or service fastener for sheet metal panels and enclosures requiring a 0.344-inch mounting hole and 1/4-20 thread engagement.

Installation Notes

Installation requires a correctly sized mounting hole of 0.344 inches in the panel before pressing or driving the captive nut into place. Power down and de-energize any enclosure or panel before servicing fasteners in live electrical or HVAC equipment. Use appropriate press or installation tooling to seat the nut flush without deforming the panel material. Verify thread engagement is clean and free of debris before assembling the mating fastener.