This is a 03 an bulkhead branch tee fitting with bulkhead nut. The fitting is not very useful without the nut! Show Polished Red Anodized Aluminum.
USA. 2PCS 4AN to AN4 to AN-4 Male AN Bulkhead Tee T-piece Adapter Fitting Blue
Redhorse Performance 804 03 2 Bulkhead Tee Adapter
AN -4 (AN4 AN 4) Bulkhead Tee Fitting in Black
AN -3 (AN3 AN 3) Bulkhead Tee Fitting Black
AN -3 (AN3 3AN) Stainless Bulkhead Tee Fitting
03 AN Male Flare 90 Degree Bulkhead Union w/ nut Show Polished Red Anodiz Alum