I've had good luck with discount hydraulic as well. On rare occasion, I've had some female JIC fittings from them crack before the appropriate number of flats have been turned on installation, but their customer service replaced them with the appropriate amount of effort. So we continue to do business. They have been a great resource for me.
Because I feel like rambling, I'm partial to the series A Quick Disconnects (ISO 7241) You'll find them worldwide on a multitude of general purpose applications. They are a bit more durable than the Agricultural (ISO 5675) which are lighter duty, typically not seen outside of North America, but are appropriate for light duty ag applications. A great argument can be made for the flat face skid steer QD's (ISO 16028), They are expensive, but very functional in practice, and gaining ground in the worldwide market.
A Series:
ISO 7241-1 Series A (6 Series)
AG:
ISO 5675 Agricultural
Skidsteer:
ISO 1628 Flushface
I would say these are the most common 3 you'll find around tractors, skid steers, excavators, ect.
The B series which is very similar to the A series, and shares the same ISO, will be found among more industrial applications like onboard drilling rigs equipped with ring line systems. Same flow rates, pressure ratings, and durability as the A series, but you just won't find them around our applications very often. I could see this being an easy accidental purchase, as they are fairly similar.
