Sigh doesn't anyone use Google?
1) BOC (AKA Linde), worldwide is one of the largest suppliers of
compressed gasses and welding equipment. I goggled BOC welding NZ
which gave me.
2) I then downloaded their pdf catalog at
On Page 10 they specify: for Acetylene Inlet 5/8 BSP RH Type 10.5 LH
Outlet 5/8-18-unf LH For Oxygen Inlet 5/8 BSP RH Type 20 RH Outlet
2) I can't be bothered to Google for north America (But you are
welcome to , never trust someone's memory) because I know them by
heart Oxygen is a CGA 540 fitting and Acetylene is a CGA 510 which
are not the same as BSP.
Now you have 3 alternatives
1- Find an adapter
2- replace your regulators
3- Have a welding supply house replace the input fittings on your
I would suggest call BOC at (in NZ) Phone: 011-64-0800-111-333
(Remember 9am eastern time in the US is 1am in NZ ;) so call after
5PM eastern time to get someone to answer....
Maybe Charles will chime in since the fittings are identical in Oz.