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 5915-01-296-8974
NSN 6135-01-544-2630
NSN 5998-00-106-4333
NSN 5950-00-023-4208
NSN 4140-01-648-2249
NSN 6220-01-505-5102
NSN 6220-01-415-1541
NSN 6145-01-658-8048
NSN 5925-00-452-1270
NSN 7035-01-619-3043
NSN 4140-01-143-7784
NSN 6145-01-536-0189