Use Bridgeport filler plugs to keep foreign objects and materials out of your electrical system by inserting them into push in, set screw and straddle type connectors when installing the fitting, but not immediately installing the cable.

E-Z Lock® AC/MC Connector 3/4″, Steel, .560″ Insulated Throat
https://hotfix.nsiindustries.com/product/e-z-lock-ac-mc-connector-3-4-steel-560-insulated-throat/
Use Bridgeport AC/MC connectors to connect AC/MC cable or flexible metal conduit to an electrical box or enclosure. A snap-in front end and single set screw design makes connecting to the knockout quick and easy. Also listed for MC-PCS cable.
E-Z Lock® Duplex AC/MC Connector 3/8″, .375″ Throat, Steel
https://hotfix.nsiindustries.com/product/e-z-lock-duplex-ac-mc-connector-3-8-375-throat-steel/
Use Bridgeport duplex connectors to join two individual runs of AC/MC cable or flexible metal conduit to a single knockout without tools. To install, simply squeeze the connector and insert it into the box or enclosure for an instant connection.
E-Z Lock® Duplex AC/MC Connector 3/8″, Steel, .560″ Throat
https://hotfix.nsiindustries.com/product/e-z-lock-duplex-ac-mc-connector-3-8-steel-560-throat/
Use Bridgeport duplex AC/MC connectors to join two runs of flexible metal conduit or AC/MC cable to an electrical box or enclosure using a single knockout. The snap-in front end and single set screw design makes installation quick and easy.
Use Bridgeport AC/MC connectors to join AC/MC cable or flexible metal conduit to an electrical box or enclosure without requiring any tools. To install, simply squeeze the connector and insert it into the box knockout for an instant connection.
E-Z Lock® AC/MC Connector 1/2″, Steel, .565″ Insulated Throat
https://hotfix.nsiindustries.com/product/e-z-lock-ac-mc-connector-1-2-steel-565-insulated-throat/
Use Bridgeport AC/MC connectors to join AC/MC cable or flexible metal conduit to an electrical box or enclosure. The snap-in front end and use of a single set screw makes connecting to the knockout quick and easy. Also listed for MC-PCS cable.
E-Z Lock® AC/MC Connector 3/8″, Steel, .406″ Insulated Throat
https://hotfix.nsiindustries.com/product/e-z-lock-ac-mc-connector-3-8-steel-406-insulated-throat/
Use Bridgeport AC/MC connector to join AC/MC cable or flexible metal conduit to an electrical box or enclosure. Snap-in front end and a single set screw makes connecting to the knockout quick and easy. Also listed for MC-PCS cable.
Use Bridgeport filler plugs to keep foreign objects and materials out of your electrical system by inserting them into push in, set screw and straddle type connectors when installing the fitting, but not immediately installing the cable.
Knockout Plug, 2″, Plastic to Cap Unused Knockout Holes
https://hotfix.nsiindustries.com/product/knockout-plug-2-plastic-to-cap-unused-knockout-holes/
Use the Bridgeport 2″ Plastic Knockout Plug to cap unused knockout holes in a box or enclosure.
Knockout Plug, 1-1/2″, Plastic to Cap Unused Knockout Holes
https://hotfix.nsiindustries.com/product/knockout-plug-1-1-2-plastic-to-cap-unused-knockout-holes/
Use the Bridgeport 1-1/2″ Plastic Knockout Plug to cap unused knockout holes in a box or enclosure.