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 6620-00-155-2608
NSN 5835-00-707-6266
NSN 5835-01-528-7454
NSN 7035-01-413-6697
NSN 6610-01-653-5985
NSN 5960-01-350-4288
NSN 5985-01-442-6800
NSN 5965-01-264-1738
NSN 6685-01-363-2765
NSN 5895-01-096-0257
NSN 5925-00-418-1531
NSN 4140-01-395-2039