0.4 per cent oxygen, balance nitrogen
A predetermined mixture of 2 or more gases in which each component is measured to extreme accuracy and its contents certified. It is normally used to standardize and assure the accuracy of highly sensitive laboratory equipment.
NSN 4140-00-470-0530
NSN 7035-00-585-2113
NSN 6220-01-308-6218
NSN 6135-00-127-1683
NSN 6320-01-420-0340
NSN 5960-01-443-3067
NSN 5835-01-442-6079
NSN 2925-00-005-1618
NSN 5985-00-196-5695
NSN 6620-01-044-3371
NSN 4140-01-246-7041
NSN 6610-01-137-1275