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 6320-01-426-8947
NSN 6320-01-452-2394
NSN 5925-01-070-4831
NSN 6620-01-323-6091
NSN 5910-00-339-8962
NSN 6145-00-241-9099
NSN 6685-00-204-6037
NSN 5935-00-285-2767
NSN 5920-00-969-2350
NSN 6685-00-608-3295
NSN 5910-00-255-6228
NSN 5985-01-496-8700