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 6145-01-148-2752
NSN 5935-01-507-1425
NSN 7035-00-679-9027
NSN 6650-00-056-1581
NSN 4140-01-175-6035
NSN 5996-00-279-1510
NSN 5835-00-660-4523
NSN 4140-01-603-3104
NSN 6320-00-513-8376
NSN 2925-01-379-0903
NSN 6110-01-135-2027
NSN 5925-00-805-3653