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 6130-01-435-8235
NSN 4140-00-702-4647
NSN 5999-00-666-3838
NSN 5985-01-138-8529
NSN 7035-01-097-8704
NSN 5925-01-469-6667
NSN 6130-00-525-9975
NSN 5960-01-425-1454
NSN 5910-01-581-8585
NSN 6220-00-876-8325
NSN 5930-01-071-3336
NSN 5905-01-658-1431