... pieces of specification, P type of general circular electric connector,accords with SJ/T1049394,7 varieties of P16,P55 screw ... etc,the diameter of contacts are φ 1.5 φ 2.5 φ 3.5 φ 5.5mm ,gilt and silver-plated. (1) Service ... 20M Ω· service life:insert and withdraw 500 times P48 aeronautic connector(connectors,circular connector,multi pole connector,heavy duty connector,aeronautic connector)