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 5950-01-071-9574
NSN 6645-01-025-1002
NSN 6110-01-643-6032
NSN 6645-00-933-2170
NSN 5930-01-439-4365
NSN 5915-00-960-4786
NSN 6105-01-393-4658
NSN 5925-00-232-3256
NSN 5996-01-424-7631
NSN 5855-01-528-7287
NSN 5998-01-191-1967
NSN 5910-01-428-2487