BU-5100-A-4-0 - 

Multi-Stacking Banana Plug, Polypropylene Insulation, 20 AWG (41 x 36)

Series 5100 BNC Male Breakouts and Series 5200 BNC Female Breakouts feature tarnish resistant plated brass body, gold-plated center contact. Types BU-5100 and BU-5200 are BNC Male/Female to tinned end wires. Types BU-5131 and BU-5231 feature BNC to alligator clips. Types BU-5144 and BU-5244 feature BNC to 0.080" pins. In addition, male only BNC connectors are available to "Clipper" Test Leads (Type BU-5114), and to standard banana plugs (Type BU-5120). All Breakouts are four inches (4") long. Wires and terminations are color coded red and black for easy identification. Types BU-3056 and BU-3156 are dual alligator clips and mini-alligator clips, respectively to completely shielded BNCs. Types BU-1156 and BU-1456 are clippers and mini clippers, respectively to completely shielded BNCs.
BNC male connector with gold plated brass material contact