Type F Connectors Amphenol RF Type F Connectors are high-performance, cost-effective connectors compliant with a 3/8-32 thread specification. These connectors provide -30dB return loss at 1Ghz while still accepting 0.022' to 0.042' diameter conductors. Amphenol RF Type F Connectors feature a threaded coupling mechanism and are ideal for cable television (CATV), set top boxes, cable modems, and more.