Allen Tel GBNC58-T 50-Ohm BNC Coaxial Connector for Twist-On, Compatible with RG/U 58 Cable, 2-Pack Coaxial connectors for network, video, security and computer peripheral interconnections BNC connectors allow ease of engagement and disengagement using bayonet couplings and overlapping dielectrics All Allen Tel BNC connectors, adapters and terminations come with gold plated contacts Twist on Comes with Allen Tel Products' standard 1 year warranty