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 5905-00-656-6627
NSN 6220-01-494-0572
NSN 6145-01-596-3156
NSN 5935-01-590-6418
NSN 6650-01-261-5239
NSN 5985-00-661-2263
NSN 5945-01-370-3994
NSN 5990-00-825-0273
NSN 7035-01-313-6973
NSN 6135-01-437-6409
NSN 5945-01-631-4904
NSN 2925-01-620-6812