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 4140-01-134-6256
NSN 5999-01-434-9427
NSN 6110-00-960-7341
NSN 6685-01-578-8790
NSN 6650-01-236-0366
NSN 5920-00-539-4168
NSN 5960-01-229-6324
NSN 5915-00-059-5629
NSN 6220-01-486-3320
NSN 6685-01-004-6182
NSN 2925-01-328-0144
NSN 5925-01-391-7718