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 7035-01-364-8454
NSN 5855-01-067-7807
NSN 5910-00-221-5060
NSN 5915-00-965-6281
NSN 6685-01-206-3847
NSN 6320-01-323-7565
NSN 6240-00-119-4182
NSN 5910-01-360-0411
NSN 6105-01-562-4530
NSN 5905-01-410-7780
NSN 5999-01-369-9316
NSN 6150-00-074-6031