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 5996-00-150-8842
NSN 5945-01-028-3112
NSN 6145-01-243-9547
NSN 5999-01-170-0337
NSN 5975-01-501-0225
NSN 5895-00-421-3648
NSN 5990-01-478-8638
NSN 6105-01-443-2980
NSN 5835-01-307-8954
NSN 6645-01-629-5919
NSN 5975-00-129-5683
NSN 5925-01-175-0234