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 6645-00-973-3868
NSN 6130-00-394-9921
NSN 5915-01-603-0012
NSN 6320-01-145-9013
NSN 6685-01-593-1528
NSN 5999-01-337-3346
NSN 5905-01-257-1673
NSN 5905-00-964-4425
NSN 5945-01-301-1601
NSN 6620-00-699-5537
NSN 7035-01-312-8573
NSN 6685-01-661-0677