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 6150-00-269-8447
NSN 5910-01-145-3380
NSN 5996-01-477-4143
NSN 5915-00-288-0071
NSN 4140-01-305-3927
NSN 6610-01-016-2722
NSN 5999-00-056-1697
NSN 6620-00-350-5817
NSN 5950-01-352-9366
NSN 5910-01-205-1891
NSN 5990-01-361-6424
NSN 6130-01-266-3691