The 228226-3 is a BNC jack to jack 50 Ohm coaxial adapter from TE Connectivity. It features a straight, panel mount bulkhead design with gold plated center contacts.
Radiall R141720000W is a BNC female to female bulkhead adapter with 50 Ohm impedance and 4 GHz operating frequency. It features a straight style, panel mount with bulkhead mounting, and gold plated center contacts.