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 5999-00-525-4320
NSN 7035-01-171-9052
NSN 5999-01-401-5322
NSN 5925-01-568-1921
NSN 5930-00-584-1765
NSN 5935-00-483-6910
NSN 6650-00-590-6151
NSN 6145-01-248-3841
NSN 5975-01-285-0284
NSN 5935-01-548-5104
NSN 6110-00-288-4179
NSN 5895-01-081-3977