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 5920-00-216-8665
NSN 5835-01-229-6964
NSN 6130-00-369-6637
NSN 5935-00-722-8588
NSN 2925-01-575-7376
NSN 5945-00-125-5499
NSN 2925-00-328-2018
NSN 6145-01-559-3998
NSN 5935-01-575-2130
NSN 5920-01-297-3133
NSN 5930-01-102-5340
NSN 5990-01-018-3953