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 6110-00-188-9874
NSN 6620-00-431-3837
NSN 5998-00-972-2180
NSN 5935-00-203-3161
NSN 5975-01-200-3379
NSN 5930-00-100-0163
NSN 7035-01-027-1718
NSN 5960-01-599-9821
NSN 6220-00-566-2848
NSN 5985-00-566-2280
NSN 5895-01-103-9639
NSN 6135-01-020-1967