"THE DRUM SHALL BE OF DOUBLE WALL CONSTRUCTION; THE COMBINED PLIES MAKING UP THE SIDEWALL (OUTER SHELL PLUS INNER TUBE) SHALL HAVE A MIN THICKNESS OF 0.108 IN. AND A MIN DRY BURSTING STRENGTH OF 900 PSI; THE DRUM TOP AND BOTTOM SHALL CONSIST OF MULTIPLES OF FIBERBOARD WITH THE OUTER PLIES CONTAINING A POLYETHYLENE MOISTURE BARRIER; THE COVER AND BOTTOM SHALL BE WAX DIPPED,ONE IN. MIN; NO METAL SHALL BE USED; OUTER SEAMS OF OUTER SIDEWALL ELEMENTS (COVER AND SHELL) SHALL BE COVERED WITH 2 INCH WATER RESISTANT TAPE GLUED WITH A WATER-RESISTANT ADHESIVE; VACU-PAK FIBER DRUM DWG NO. 12731 ANNOTATES THE MARKING REQMTS-SUCH AS HIGH EXPLOSIVES DANGEROUS,NSN,50 LBS,NITROGUANIDINE MIL-N-494 TYPE II CLASS 1,EXPLOSIVE A,LOT,DRUM NO.,DOT 21C60 MFG IDENT"