A relatively thin metallic item, having a concave or cupped contour, designed to effect its own seal by compression against the circumference of a hole. It is used as a blowout plug in boilers, engines, and the like to relieve the pressure created by the expansion of fluids caused by heat or freezing.
Classification: Parts for steam or other vapor generating boilers and super-heated water boilers, except heat exchangers
NSN 5935-00-725-1990
NSN 5895-00-308-6555
NSN 5999-01-010-1082
NSN 5985-00-176-1499
NSN 5950-01-480-7154
NSN 6150-00-468-1885
NSN 6130-01-519-2620
NSN 2925-01-205-4584
NSN 6650-01-472-3621
NSN 6685-00-569-1764
NSN 5960-00-686-6916
NSN 6620-01-298-3806