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 5990-01-368-2604
NSN 5999-01-500-1835
NSN 5930-01-167-8946
NSN 5999-01-141-8516
NSN 5905-01-323-0660
NSN 5996-01-250-2814
NSN 5965-01-150-1920
NSN 5855-01-376-0363
NSN 5965-01-260-2547
NSN 5895-01-539-9397
NSN 6145-00-266-8453
NSN 6130-01-036-8581