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 6620-00-170-5296
NSN 5930-01-481-3851
NSN 5835-01-125-6676
NSN 6240-01-657-0501
NSN 6105-01-419-5447
NSN 5965-00-630-7872
NSN 4140-00-534-1408
NSN 5920-00-907-5003
NSN 5950-01-513-9108
NSN 6650-01-214-1710
NSN 5855-01-543-6796
NSN 4140-00-660-8699