Need to get an new aerator and housing in whatever safe materials/metals for the kitchen sink. It's the nozzle that your water passes through at your sink tap, and can often be unscrewed and fixed/replaced.
Measuring the diameter manually (no calipers here) the 'outie' threads (male) are about 17mm give or take, so that'd be about m18.
Though i'm having trouble finding that size, and need/want a 'quality' silver whatever metal housing and aerator. Because that's the water i drink, yo.
I have found housing+aerator's in that size at aliexpress. Even to just a 18mm to 22mm adapter, if i want to get a fancy 'adjustable flow' housing+aerator locally. Though they have though fancy nozzles selling there and much cheaper.
I don't want chemicals in my water. So i'm willing to pay what i need to, but i'm having trouble finding any of this legitimately online. They might be restricted to plumbers seeing a sites catalogue or parts to keep making that money or sell completely new systems. Or to deter idiots, ymmv.
Are there any plumbing supplies stores or ways to order online? Or is aliexpress going to be fine?
Bunnings