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 5920-01-257-5922
NSN 5998-01-157-5033
NSN 5910-01-409-2852
NSN 6685-00-269-4895
NSN 5999-00-384-8658
NSN 5975-00-920-4205
NSN 4140-00-095-6452
NSN 5999-00-929-5846
NSN 7035-01-071-5214
NSN 6620-01-529-7513
NSN 6135-01-273-1253
NSN 5950-01-432-2878