{http://www.ceramaseal.com/reference/ref_figures/n.jpg Male N-Type connector assembly}



Connector for [CoaxialCable] types: RG-8/U, RG-9/U, RG-213/U, RG-214/U, RG-225/U



The above image shows a clamp-type N connector.

Also available are N connectors which require crimping (such as the Pulse brand), and are generally much cheaper.



The N connector was invented by and named for Paul Neill of BellLabs. It was the first connector capable of true microwave performance. N connectors have threaded coupling interfaces and are 50 ohms in impedance. There are also 75 ohm versions available, but they will not mate with the more common 50 ohm version. N connectors operate up to 11 GHz in the common 50 ohm impedance design. Although less common, there are also precision versions of the N connector available which operate up to 18 GHz. Applications for the N connector include Local Area Networks (LANs); test equipment; broadcast, satellite and military communication equipment.



from (http://www.cambridgeproducts.com/n.htm http://www.cambridgeproducts.com/n.htm)