Furu, those are standard flat face disconnects, we see that everyday and the reason we switched to the screw together disconnects. No flat face quick disconnect can take vibration, a mulching head is nothing compared to a hydraulic breaker,for vibration, in the past we've had to replace both halves of the flat face fittings in only a few hours of operating due to vibration. We'd buy those flat face disconnects by the dozens at a time in order to keep enough on hand at any one time do a simple jack hammer job.
Once we went to the screw together quick disconnects, I've yet to replace a single one in all the hundreds of hours we've run them, the screw together units also can be undone and hooked up under full pressure, eliminating the need for cracking the fittings or having a bleed off line to get them either hooked up or disconnected.
We've also in the past, used screw together wing nut style fittings, similar to those used on semi wet kits for the breaker and things that vibrate, those have finer threads and still tend to strip the threads on things that vibrate, but will outlast those flat face fittings 5-10 to one.
On the skid steers that require a lot of ends, we've converted them all back to standard pioneer adapters and ends again, identical to what was used on tractors 50 years ago, both the tips and the female adapters are cheap compared to flat face fittings and seem to last years compared to months for flat face fittings.
Right off hand I can't recall of the name of the good fittings, my hydraulic hose supplier just gets them for me when I need a set, not cheap but well worth it, Stucci or something like that they are called, about 200 a set if I recall, do some googling on the internet and I'm sure you can find them.