I've been using nickel plated brass glands so far without a flex nut.
While looking for flex nut options I'm finding either stainless steel or nylon; however,the nylon only comes with nylon glands.
I'm wondering how may are using nylon glands vs the brass models, and if you use a flex but which one?
Thing I've seen at least one of Packhorses with the nylon model.
Don't know where your'e living and how good your German is.....
These glands I've been using on some occassions: http://shop.dev-pein.de/Selbstbau/Ka...g-PG-9-KN.html
They are (I think) the glands you asking for? They are fiberglass re-inforced, they seal IP68 up to 10 bar.
I use metal or nylon depending on the canister. If I think it's going to get tugged about I use thicker 4-core 10mm cable, so no strain relief.
Nylon has never let me down when you use it with Sikaflex and a cable tie. The only issue I have is the ones I've seen have very short threads and come with a nylon screw...which gets the glue treatment. Nylon will never be as strong as metal however it all depends on the user/abuser.