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 5990-01-261-2962
NSN 6645-01-408-4576
NSN 2925-00-064-6629
NSN 4140-01-126-8999
NSN 5895-01-494-9674
NSN 6620-01-100-8899
NSN 5960-00-422-0578
NSN 5999-01-392-6313
NSN 6320-01-326-1316
NSN 5895-01-634-0630
NSN 5895-00-091-1288
NSN 4140-01-053-5359