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 6110-01-415-5086
NSN 4140-01-139-4041
NSN 6650-00-938-2153
NSN 6320-01-457-2805
NSN 5999-00-099-0025
NSN 6650-00-618-9398
NSN 5915-01-630-3083
NSN 2925-00-073-9375
NSN 5990-01-040-1320
NSN 5960-01-399-4327
NSN 6150-00-055-4434
NSN 6220-00-872-0618