Is the metal box covering the gauge considered an overpack?
A5. No. It is the opinion of this Office that the metal box covering the gauge is not an overpack as defined in § 171.8 and therefore, is not required to be marked and labeled. I hope this information is helpful. Please contact us if you require additional assistance. Sincerely, Charles E. Betts Chief, Standards Development Office of Hazardous Materials Standards 172.202, 177.817, 172.