Chinese 40mm Respirator hose NATO filters on Soviet masks

Testing a Chinese 40mm standardised respirator/gas mask hose on various Soviet masks, standardised 40mm accepts both NATO STANAG and Soviet GOST 40mm filters meaning that with the hose a safe 40mm NATO or RD40 filter can be used with a GOST mask.
I currently have flu so smell tests are not as accurate as they normally are, but it seems when a 40mm NATO filter is attached properly the hose will work perfectly with GOST masks.