Plumbing Supplies
Dixon Air King AM28 Iron Air Hose Fitting, 4 Lug Quick Acting Coupling, 2" NPT Female End
Air King 4-Lug quick acting universal coupling female NPT end Made of iron Include safety clip 2" NPT female end Rated to 150 psi working pressure
https://www.bizrate.co.uk/plumbingsupplies/dixon-air-king-am28-iron-oid38689326886.html