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 6685-01-430-1142
NSN 5985-00-529-0093
NSN 5905-00-533-6272
NSN 5835-01-080-3678
NSN 6320-00-857-4073
NSN 5990-00-876-0576
NSN 5835-01-314-2781
NSN 6110-01-523-1583
NSN 5930-01-524-1813
NSN 6130-01-634-0603
NSN 6320-01-328-6575
NSN 5835-01-632-6627