Compliant with GJB 599B-2012 standards; three-head threaded quick connection, capable of preventing oblique insertion and misalignment; small in size, light in weight, high density of contact components; high wear resistance and corrosion resistance nickel fluorocarbon polymer coating; green and environmentally friendly, can replace military green cadmium coating. Excellent environmental resistance (sand dust, freezing, mold, humid heat, vibration, impact, electromagnetic interference shielding, etc.).