The NU2 series is Aventics' hose-barb and swivel fitting line — barbed insert fittings for rubber hose and reinforced pneumatic hose, with male and female NPT, BSPP, and metric thread variants. Swivel and rigid body options cover tube IDs from 4 mm through 19 mm with brass and steel constructions. The NU2 platform serves traditional rubber-hose pneumatic installations and high-vibration applications where push-in fittings won't hold against pulsation or hose movement.