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 6685-00-630-4519
NSN 5999-00-787-6729
NSN 6240-01-394-8592
NSN 5855-00-832-9341
NSN 5835-01-276-1201
NSN 6145-01-586-6269
NSN 6135-00-756-6149
NSN 2925-01-631-2372
NSN 5895-01-632-0067
NSN 5915-01-472-3620
NSN 6110-01-263-3744
NSN 5945-01-501-5487