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 2925-01-551-5375
NSN 6240-00-497-8612
NSN 6620-01-481-1358
NSN 5950-01-388-0860
NSN 6685-00-627-0996
NSN 6150-01-260-5293
NSN 5945-01-458-8391
NSN 4140-01-487-7425
NSN 5925-01-087-9145
NSN 6620-01-237-5603
NSN 7035-00-916-9380
NSN 5915-01-258-5799