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 6220-01-310-2513
NSN 5998-01-080-0352
NSN 6150-00-676-0981
NSN 6685-01-350-3451
NSN 5999-00-989-2306
NSN 5930-01-359-2088
NSN 6240-01-622-9461
NSN 5999-01-370-4840
NSN 2925-01-547-4565
NSN 5910-01-580-0857
NSN 6240-01-162-4086
NSN 5950-01-061-4983