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 5915-01-141-3561
NSN 6105-01-457-6198
NSN 6220-00-108-8598
NSN 5910-00-706-5068
NSN 5996-00-021-5624
NSN 2925-01-097-0903
NSN 6240-01-383-7448
NSN 5950-00-259-3063
NSN 5960-01-632-6576
NSN 5960-01-141-3252
NSN 5999-00-670-0712
NSN 5915-01-463-7373