Orion 5.5 air coupler (Orion 5.5 (Swedish standard))
Where Orion 5.5 (Swedish standard) is used, its real dimensions, and how to connect it.
Orion 5.5 (Swedish standard)Thread standard
InterchangeOrion / ARO 5.5 (Swedish standard, 5.5 mm nominal)
Body size1/4 inch body typical
Typical port thread1/4 BSP
Regioncommon in Scandinavia and parts of Europe
Used on: Scandinavian and some European air systems.
The Orion 5.5 (sometimes called ARO 5.5) is close in size and shape to the Euro 7.2 but is a distinct profile, so an Orion plug will not seat in a Euro coupler. Match the profile end to end rather than by eye.
Quick-connect click fittings from Hozelock, Gardena and Karcher are proprietary and do not interchange. They all sit on top of a standard thread underneath, so the reliable way to move between brands is to adapt at the threaded tap or hose-end fitting, then use each brand's own connector above it.
Connect this fitting
Connect to Euro 7.2 air couplernot compatibleIndustrial / Milton M-style air couplerrelated fitting (1/4" Industrial (Type M))ARO 210 / A-style air couplerrelated fitting (1/4" ARO 210 (Type A))Automotive / Tru-Flate T-style air couplerrelated fitting (1/4" Automotive (Type T))Euro 7.2 air couplerrelated fitting (Euro 7.2 (German standard))Japan / Nitto Hi-Cupla air couplerrelated fitting (Nitto / Japan type (Hi-Cupla))
Sources: Common pneumatic quick-connect interchange profiles (Milton, ARO, Euro, Orion), XHnotion