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 6130-01-207-4914
NSN 5945-00-389-7948
NSN 5990-00-968-7685
NSN 5960-00-306-4177
NSN 6150-01-458-0385
NSN 6145-01-541-4302
NSN 5935-01-430-5562
NSN 5960-01-116-8861
NSN 5999-00-158-5118
NSN 6645-00-313-2324
NSN 5960-01-134-1793
NSN 5985-01-471-7205