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 5855-00-532-0025
NSN 5920-01-125-6469
NSN 5910-01-175-6171
NSN 6620-01-658-1849
NSN 6685-01-341-1069
NSN 5905-01-591-4015
NSN 6240-01-482-4819
NSN 5910-01-585-4162
NSN 6610-01-571-3422
NSN 5960-01-198-7965
NSN 5920-00-070-8712
NSN 5950-01-603-3554