Radiall 50 Ohm N Type RF Coaxial Female to Female Sealed Bulkhead Adapters 50 Ohm N Type RF coaxial female to female bulkhead / panel mount adapters with screw-on mating. These RF coax N socket to N socket bulkhead mount hermetic adapters are supplied with a panel seal , have maximum panel cut-out dimensions of 16.1 x 13.7mm and are for use with a maximum panel thickness of 6.5mm.