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 5975-00-471-8431
NSN 5895-01-188-5977
NSN 6645-01-543-7834
NSN 5855-00-879-7245
NSN 6220-00-629-9271
NSN 6135-00-643-4843
NSN 6620-01-179-9737
NSN 5999-01-318-3396
NSN 5990-01-110-8979
NSN 5855-00-973-5717
NSN 6645-01-097-5831
NSN 5855-01-100-3272