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 5905-00-629-0111
NSN 7035-01-245-2858
NSN 6130-00-679-1873
NSN 6620-01-311-3516
NSN 5895-00-880-4747
NSN 5835-01-596-9908
NSN 5920-01-605-1427
NSN 2925-01-441-8958
NSN 5950-00-757-2081
NSN 2925-00-839-6815
NSN 6620-01-391-9829
NSN 5910-00-597-6510