D600 boom arm on Matthews Hollywood Century C Stand

Can you use an Avenger D600 boom on Matthews Hollywood Century C stand? Is the fit at the connection point "spigot" good or should you match Avenger booms with Avenger stands and Matthews booms with Matthews stands?

Yes, you can use the Matthews C-Stand with the Avenger D-600 Boom Arm…..

It will mount on any stand as long as you have a 5/8 spigot

There ARE tiny differences among the supposedly standarised spigots on lightstands. Some are 5/8th inch while some are 16mm - only 1/8th mm difference nominally. However, factor in machining errors and you may just find that some spigots are a tad tight in the "matching" sockets. I haven't found any pattern to this so it's not a matter of XYZ-brand spigot doesn't fit into ABC-brand socket.

This is nothing which can't be rectified by 5 minutes application of emery paper (or a file if you're really, really impatient) to the offending spigot though - certainly nothing to worry about. Mounting hardware is one of the things in photography which is thankfully standardised so anything you may find which doesn't quite fit is merely down to manufacuring tolerances rather than one make being incompatible with another.