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 2925-01-645-2948
NSN 5985-01-152-2693
NSN 5910-00-780-0977
NSN 5835-01-250-2939
NSN 5950-00-277-4701
NSN 5855-01-400-1590
NSN 5999-01-550-6081
NSN 4140-01-116-3138
NSN 5998-01-504-8476
NSN 5915-00-518-4656
NSN 7035-00-541-8516
NSN 6220-01-086-4061