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 6220-01-487-3904
NSN 5990-01-099-8574
NSN 5998-00-971-8207
NSN 6145-01-121-1822
NSN 7035-00-117-0418
NSN 5999-00-083-9055
NSN 6110-00-038-7230
NSN 6240-01-580-0609
NSN 5960-00-840-7103
NSN 7035-01-189-7367
NSN 6240-01-362-2467
NSN 6130-01-317-0369