284000404 is listed in DICSA's technical catalogue under One piece fittings 43 Series 1SN / R1AT / 2SN / R2AT / R16 / 2SC / 3TE / R17 / One piece BSP - BSPT fittings / One piece double hexagonal BSP female 60° cone.
Hose fittings and ferrules must be selected as an assembly system: match the hose construction, end connection and documented assembly specification.
Source specifications: Material: Mild Steel; Port 1 thread: 1/4" BSP.
Use the catalogue drawing and exact part reference to check connection geometry, hose or tube compatibility, and installation requirements.
