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 5935-00-028-4139
NSN 5915-00-391-0163
NSN 6650-01-442-2596
NSN 6220-01-425-1588
NSN 5855-00-014-5008
NSN 5930-01-500-0391
NSN 5910-01-130-1786
NSN 4140-01-634-0330
NSN 5996-01-228-5334
NSN 5935-01-339-3538
NSN 6135-01-071-4923
NSN 6150-00-359-2019