Perhaps there is a bit of confusion here which I thought was addressed by aaxiss; I'm not talking about the type that snaps on and off which is what it looks like you're referring to? Maybe I'm the one that's confused and the original poster was inquiring about the type that snap on and off? I've used those on glow model throttle linkages.

The ones I'm talking about are mounted with a screw through the horn/arm using a standoff spacer and usually have a lock nut installed on the backside as well. Like these.....