Plug with male thread and O-ring undercut. 2 inch BSP thread. Design for easy manual capping. Maybe someone will find it useful:)
Printed with PETG filament from Devil Design on Creality Ender 3 S1 Pro. Layer 0.2mm, infill 40%, with supports. Printed approximately in 9.5h.
The author marked this model as their own original creation.