Fixed-Length RF Cable Assemblies Johnson / Cinch Connectivity Solutions Fixed-Length RF Cable Assemblies feature a wide range of 50Ω and 75Ω assemblies from 3' to 60'. These RF cable assemblies are available in BNC, MCX, MMCX, N, SMA, SMB, and UMC series. The product line includes cables, plugs, and jack types (straight, right angle, bulkhead, mini), and as well as hand-formable types. Johnson / Cinch Connectivity Solutions Fixed-Length RF Cable Assemblies can meet the most unique specifications.