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 6150-01-490-7147
NSN 6685-01-138-5879
NSN 5965-00-246-5612
NSN 5998-01-541-3137
NSN 6650-01-429-9242
NSN 6150-00-081-1786
NSN 5999-00-114-1486
NSN 6110-00-753-7677
NSN 5915-00-159-7349
NSN 6150-01-368-6958
NSN 5950-01-543-9640
NSN 5985-01-530-4184