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 5999-01-601-7061
NSN 6135-01-111-1495
NSN 5975-01-440-8352
NSN 5950-00-080-4458
NSN 7035-00-679-9027
NSN 6150-00-021-8051
NSN 5925-01-123-9104
NSN 5895-01-634-0630
NSN 6320-01-260-7390
NSN 5920-01-479-9605
NSN 6650-01-492-5263
NSN 5915-00-918-3721