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 6110-01-456-5775
NSN 6645-01-456-0103
NSN 5910-00-947-9721
NSN 5855-01-312-5160
NSN 5999-00-081-5567
NSN 6610-00-891-6370
NSN 7035-00-148-2300
NSN 5920-01-170-3464
NSN 6135-01-421-1052
NSN 6645-01-421-5765
NSN 5975-00-460-8784
NSN 7035-01-627-8718