Common connector gender for antenna

I'm doing a project where I want to fit detachable 433MHz monopole antennas. I instinctively visualized a female SMA connector base on the box and an antenna with a male connector. When I browsed through online sources for a ready-made antenna, sure enough most of them come with a male connector. So far so good.

But when I checked the wi-fi modems and routers I have on hand, I was surprised to see that they all use male connectors at the base and female connectors on the antennas - exactly the opposite of what I'd intended to use.

Technically, I'm free to use whichever gender I choose for my design, but I like to stick with convention whenever possible. Is there a common practice with commercial products regarding SMA connector gender for external attachments?

Note: By gender, I mean that of the inner conductor, not the threaded outer one.

You are likely describing Reversed Polarity SMA - part modem has external thread and pin, part on antenna - nut and socket. This is common practice connecting antenna.
More here:
https://en.wikipedia.org/wiki/SMA_connector

Ah, so Wi-Fi manufacturers use the RP type mainly to discourage end-user tinkering. I missed that part when I glanced through that page earlier. Thanks for the heads up. Problem is, I source my parts more and more from China these days and the cheapest antenna with a reverse-polarity connector costs more than twice as much as one with normal polarity. Oh, well.

I believe the reverse polarity SMA is chosen to aid FCC certification. The ISM band is licence free up to a certain maximum EIRP. So effectivly if a user swaps the antenna to a high gain antenna they can exceed the limit. Back in the early days of WiFi, manufacturers were allowed to have removable antennas if they used a proprietary connector. The reverse SMA was a really simple way of making it proprietary( or non standard anyway). Now of course the rSMA is cheap and easily to find the original purpose doesn't really stack up. You can buy any number of high gain antenna with rSMA, but the precedent was set with the FCC.

Of course its an absolute PITA for anyone who does any RF work.

For the original question though. At 433MHz the convention would probably be to use normal SMA or more likely BNC or TNC. Reverse SMA is pretty much just a WiFi anomaly.

OK then, I guess I'll use normal SMA connectors on both sides. Thanks for the enlightenment, guys.