Molex 2.5 mm Nano-Fit Terminal Position Assurance (TPA) RetainersNano-Fit Terminal Position Assurance (TPA) retainers for use with Nano-Fit 105307 and 105308 series crimp housings. These TPA retainers ensure that the crimp terminals are fully seated in the Nano-Fit crimp housings and prevent terminal backout. In the event of the main retention feature in the housings failing the TPA continues to retain the contactsMolex 2.5mm Nano-Fit Wire to Board Connector System