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 5905-01-268-5273
NSN 5925-01-628-4332
NSN 5965-00-356-3838
NSN 5985-01-417-2139
NSN 6145-01-510-2083
NSN 5999-01-593-9096
NSN 5985-00-621-1850
NSN 5915-01-581-5234
NSN 5855-00-361-0167
NSN 5915-01-125-9340
NSN 6610-01-378-7379
NSN 6645-01-575-6955