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 6620-01-380-4882
NSN 7035-00-043-1325
NSN 5985-00-983-9433
NSN 5895-01-259-6692
NSN 6150-01-328-5759
NSN 5990-00-788-3829
NSN 5990-01-374-3877
NSN 6220-00-542-4898
NSN 6685-00-480-1711
NSN 6240-00-871-6320
NSN 5920-01-449-2172
NSN 5999-01-212-4033