555040606 is listed in DICSA's technical catalogue under Micro-hose fittings / Crimp fittings / Straight swivel female BSP 60° cone Micro-hose.
Check the exact accessory reference, dimensions and installation arrangement for the intended assembly.
Source specifications: Material: Carbon steel; Port 1 thread: 3/8" BSP.
Use the catalogue drawing and exact part reference to check connection geometry, hose or tube compatibility, and installation requirements.
