For when you want that plug to stay connected no matter what! User in situations where you movement/Vibration/need it to be portable but secure etc2.1mm x 5.5mm DC Connector Plug with Locking Screw collar&Matching Metal Panel Mount SocketStock code - UJTechnical specs - PLUGOutside diameter: 5.5mmInside diameter: 2.1mmShaft length: 10mmOverall length: 52mmTechnical specs - SOCKETMaximum Panel Thickness - 2mmDiameter of fitting hole - 8mmVoltage rating - 0-24V DC/3 AmpPin layout - 3 pin (pos,neg,switched)Complete with Washer/NutIdeal for projects, repairs etc Standard DC PlugStandard solder tag type NOT crimp or re-wireablePrice for one set is for ONE plug & ONE matching SocketPrice for TWO is two of each etc - these fittings are only soldin matching sets - we will not split them, and the screwcollar on the DC Plug will NOT fit the screw thread on standardmetal panel mount sockets - the thread is not usually long enough MPN P2G21LOCK Brand P2G Unit Type Unit