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 5925-01-440-5875
NSN 5930-01-340-0900
NSN 6645-01-556-5263
NSN 6220-01-468-6030
NSN 5950-01-522-0892
NSN 6105-01-308-0942
NSN 6685-01-323-5272
NSN 5895-00-328-4580
NSN 6240-01-640-7265
NSN 5895-01-198-4041
NSN 5996-01-077-2231
NSN 5945-01-207-6564