This single conductor connector is rated IP68 (submersible) and can either lock together or friction fit for easy removal.   It is ideally suited for SSB antennas that need to be removed. 

Price is for male and female set.

• Quick and easy snap lock mating
• Simple unlocking tool 
• Long-term UV and Ozone resistance
• Self-cleaning contact grid
• High current capacity rated at 50 Amps
• “Touch-Proof” Design
• Engineered to Meet UL, TUV, IEC/CEI, NEC and DIN V
• Durable spring characteristics due to grid elements