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 5990-01-390-2177
NSN 6685-01-049-3726
NSN 5960-01-624-1170
NSN 6110-01-393-5093
NSN 6150-00-647-3285
NSN 6645-00-843-8837
NSN 6685-01-483-0349
NSN 6610-01-361-9988
NSN 5950-01-415-2466
NSN 6110-01-289-4689
NSN 6220-00-121-1885
NSN 5999-01-457-0242