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 4140-01-254-3689
NSN 5996-00-351-2369
NSN 6685-01-641-8373
NSN 5998-01-015-6092
NSN 5925-01-382-9085
NSN 6110-01-381-1269
NSN 6645-01-171-3242
NSN 5920-00-874-1155
NSN 5999-00-185-6032
NSN 6610-01-288-6103
NSN 4140-01-109-0451
NSN 4140-01-081-4790