Coax Connectors 10-503-B126-BULK are BNC 12G Insulated Bulkhead Jack to Jack Adaptors (Nickel & ID) - 100 Pack.
Performance
-28.0203 dB @ 3.0 GHz
-25.8473 dB @ 4.5 GHz
-24.2132 dB @ 6.0 GHz
-23.3678 dB @ 9.0 GHz
-33.2842 dB @ 12.0 GHz
-12.7172 dB @ 18.0 GHz