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 5965-01-005-0341
NSN 6220-00-260-1711
NSN 6650-01-276-4486
NSN 6650-00-809-1817
NSN 6645-01-558-6229
NSN 5935-01-420-6452
NSN 5925-01-016-1146
NSN 5835-01-222-2030
NSN 5915-01-263-0923
NSN 5920-01-100-3018
NSN 6620-01-322-0018
NSN 5910-00-911-2755