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 5835-01-522-9881
NSN 5950-01-071-2027
NSN 6620-01-480-6887
NSN 5895-00-899-0334
NSN 5910-01-103-5574
NSN 5990-00-166-9476
NSN 5930-00-457-5711
NSN 5999-01-401-5322
NSN 5905-01-336-6641
NSN 6650-01-649-8144
NSN 6685-00-196-5592
NSN 5996-01-285-6389