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 6220-01-578-7497
NSN 5905-01-374-1076
NSN 6145-00-989-0273
NSN 5915-00-833-9025
NSN 6110-00-174-9353
NSN 5905-01-501-5210
NSN 4140-01-103-0902
NSN 5975-00-444-7844
NSN 6220-01-425-0876
NSN 5925-01-465-7565
NSN 6620-01-157-4417
NSN 6240-00-313-2515