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 6685-01-380-6838
NSN 5935-01-209-2221
NSN 6150-01-295-0464
NSN 6650-00-736-4279
NSN 6645-01-387-2063
NSN 5930-00-865-6784
NSN 5910-01-344-5556
NSN 5998-01-168-8387
NSN 5910-00-875-4654
NSN 5975-01-108-2985
NSN 6645-00-269-2764
NSN 6145-01-046-5565