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 6220-01-260-3033
NSN 5996-00-925-8402
NSN 6240-01-212-9535
NSN 6645-01-463-3441
NSN 5945-01-500-0693
NSN 6150-01-507-7828
NSN 5945-01-134-3941
NSN 6645-01-633-0303
NSN 6220-01-192-3451
NSN 5895-01-173-3142
NSN 6685-00-203-4485
NSN 5935-01-441-2236