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 6610-01-630-7202
NSN 6685-01-649-9615
NSN 4140-01-648-4791
NSN 5999-01-044-6250
NSN 6220-01-371-3430
NSN 6240-00-813-6328
NSN 6610-01-286-3079
NSN 5935-00-529-0921
NSN 5895-01-320-3870
NSN 5910-00-790-0700
NSN 6105-01-401-5361
NSN 6620-00-923-8470