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 5910-00-596-1417
NSN 5965-01-629-4663
NSN 5925-00-116-8706
NSN 5915-01-150-0246
NSN 7035-01-649-0424
NSN 5999-01-249-1056
NSN 5910-01-389-1885
NSN 6135-01-280-2883
NSN 6685-01-606-9171
NSN 6135-00-958-7981
NSN 5835-00-622-3334
NSN 6645-00-337-8298