Cheers Rob,

Just got word back on these:

10pcs/lot 6mm Tube M8 Thread Pneumatic Fitting Quick Joint Connector PC6-M8

http://s.aliexpress.com/IbA3QVjq

Says they are M8x1, if you go via the mobile app you get 16% off, works out about £5 for 10 or around 40p each, not quite the same as the others.

Dean how comes you change them for push fit type anyway, are the standard clamp type not very good that come with them?

.Me