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 5920-00-864-6622
NSN 6645-00-269-2764
NSN 6220-01-359-3993
NSN 5996-00-723-3893
NSN 5895-01-163-4468
NSN 6150-01-170-6968
NSN 6620-01-605-2590
NSN 7035-00-185-8683
NSN 5920-01-543-1729
NSN 4140-01-127-6112
NSN 6150-00-952-1993
NSN 5930-01-492-6590