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 5999-00-763-8713
NSN 6145-00-095-2492
NSN 6320-01-177-3192
NSN 5990-00-236-0831
NSN 5990-00-336-2054
NSN 5935-01-045-1640
NSN 6220-01-041-5885
NSN 6130-01-473-1805
NSN 5990-00-982-2760
NSN 5920-01-324-2054
NSN 6130-00-153-3136
NSN 7035-01-013-0934