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 6220-01-175-9052
NSN 5910-00-915-6418
NSN 6240-00-357-7385
NSN 5965-01-617-5557
NSN 5925-01-254-9180
NSN 5985-00-369-9299
NSN 6135-00-505-0679
NSN 6130-01-241-9509
NSN 6610-01-013-8922
NSN 6220-00-113-3166
NSN 5999-00-469-5031
NSN 6645-01-550-9669