MIL-B-18897 F - MIL-B-18897F (NOTICE 1) , MILITARY SPECIFICATION: BOILERS, STEAM AND HOT WATER, WATERTUBE (STRAIGHT BARE AND FINNED TUBE), CAST IRON AND FIREBOX, PACKAGED TYPE (40,000 TO 35,000 BTU/HR THERMAL OUTPUT CAPACITY) (29 JUL 2003) [NO S/S DOCUMENT]