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 6220-00-353-0942
NSN 4140-01-479-8654
NSN 5855-01-658-4510
NSN 6110-01-415-5086
NSN 6150-01-018-6233
NSN 4140-00-186-3062
NSN 5915-01-082-9581
NSN 6610-01-422-9508
NSN 6135-00-027-3914
NSN 6150-00-576-3964
NSN 2925-01-629-9416
NSN 6620-00-162-9877