... —Bayonet coupling, locking and releasing quickly—An alloy of aluminum shell(chromium-plating), salt spray resistance=500hours—Crimp connection terminals— ... transposition key and key slot—EMI/RFI shielding and shell to shell conductivity—Meet the US military standard: MIL-DTL-38999 ... Resistance≥5000MΩ(normal condition)≥100MΩ(Dampness and Heat condition)Shell-to-shell conductivity≤2.5 mΩ(B,W,Ch)≤1.0 ...