You can order an Greenfield connector or you can order a TITE-BITE® connector. When you ask for a Greenfield connector, you get a connector with a screw that clamps a ring around the conduit. The T&B TITE-BITE has a saddle that presses down and is asked for by name. It comes in sizes from 3/8" to 4" and in 45degree through 90degree. They can be ordered with or without the insulated throat option. All that having been said, on larger sizes of armored cable, you use the Greenfield connector and not the BX connector. You can compare this to the TB254 which is a standard squeeze connector to see the difference.