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 5915-01-420-5777
NSN 4140-01-322-5182
NSN 5990-01-602-6701
NSN 6645-00-382-8994
NSN 6220-01-090-6443
NSN 5950-01-198-9152
NSN 5855-00-361-0167
NSN 6130-01-027-8747
NSN 6220-00-737-0869
NSN 5915-00-503-5576
NSN 5960-00-485-8800
NSN 5965-01-003-2641