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 5835-01-242-9806
NSN 5975-01-264-1259
NSN 5975-00-116-3874
NSN 5915-01-517-3920
NSN 6645-01-099-4322
NSN 6220-01-167-7859
NSN 5855-01-246-4274
NSN 6240-01-352-0882
NSN 6105-01-233-6951
NSN 5895-01-492-4841
NSN 4140-01-382-9517
NSN 5996-00-278-5193