Arlington 4204A 1-1/4" Knockout Connector for Flex, AC, MCI, and NM Cable

Make cable entry reliable and professional with the Arlington 4204A 1-1/4" knockout connector. This Arlington Industries conduit adapter is built for contractors and integrators who need a fast, safe way to terminate Flex, AC, MCI and NM cable at a knockout. The twin-screw, zinc die-cast body provides rugged durability while the insulated throat reduces the risk of conductor abrasion and shorts—especially important in low-voltage security, surveillance and monitoring systems. Accepting cable from 1.385" to 1.640" with a defined 1.365" end stop, the 4204A ensures consistent cable positioning for neat, code-compliant terminations. It secures into a 1-1/4" knockout and tightens with a locknut for a dependable hold that stands up to vibration and handling on job sites. Use it in CCTV camera mounts, access control panels, network enclosures, and other low-voltage installations to speed up installs and improve long-term reliability. Add the Arlington 4204A to your toolkit for safer, cleaner cable management—order now or specify it on your next security or networking project.

• Provides secure cable retention for Flex, AC, MCI and NM runs, reducing pull-out and strain on terminations
• Insulated throat protects conductors from abrasion and shorting in low-voltage and security installations
• Twin-screw zinc die-cast construction delivers durable, corrosion-resistant performance for long-term reliability
• Wide cable range (1.385"–1.640") and 1.365" end stop accommodate common cable sizes for faster installs
• Installs quickly into a 1-1/4" knockout and locks with a nut for a consistent, professional finish
• Ideal for CCTV, access control, and network monitoring setups where reliable cable entry is critical