Better quality F connectors?

Hello, all the F connectors I have seen in the commerce, seem to be cheap and bad quality. Is there any brand that makes better quality F connectors?

Yes..
http://www.bomarinterconnect.com/
or
https://emersonconnectivity.com/OA_H...10020:22372:US

Emerson F-Connectors are especially high quality but a bit expensive..

Thanks for the answer

Try
http://www.jyebao.com.tw/