push to connect fitting

They're used to reduce assembly costs. Because they are dang sure only marginally reusable!

 

You measured correct, just NPT threads are kinda funky. If you subtract a 1/4 from your measurement it should be close to NPT size as a general rule.

 

AnythingTruck.com, Truck & Trailer Parts and Accessories Warehouse

 

Volvo carries those fittings, if you decide to replace just the o-ring you need to go to a o-ring supplier that will mic the o-ring and give you the right size.

 

I went to Parker store and got 1 of each size quick connectors for emergencies . About 5 or 6 fittings. They told Me take them no charge! I love the Parker Store

 

It is for sure the go to for hose assemblies. Plus, you never have to worry about quality. I have been in multiple different stores and the staff seemed knowledgable at all of them. As long as you know what you need. Stockage levels vary on brass. Plus they almost always have minimum orders if they dont stock it, which sucks. But hey, when you gotta have it......buy extras.