Looks like it. It's a pretty simple jack, with corresponding simple plug. And in a manufacturing sense, that makes it pretty cheap.
I've even seen RCA jacks & Plugs used for transmit & receive; the old Ten-Tec Argonaut (probably over 40 years old) used RCA jacks for the RF. Course, it's power maxes out at about 5 watts.
Pretty much anything like a BNC jack would be way more expensive, a UHF/SO-239 jack would be too, but eat a lot of real estate on the back panel, etc.
