The 050-424-3188-220 is a SSMC Straight Plug with gold-plated beryllium copper contacts. It is made of brass with gold/nickel plated finish and comes with a PTFE insulator. It is suitable for RG174/U and 316/U cable. This SSMC PLUG STRT RG316 SSMC micro miniature connectors are used where a positive mechanical engagement is required and where space permits the use of torque wrenches.