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 6110-00-557-8631
NSN 6645-01-523-8809
NSN 6240-01-032-4624
NSN 2925-01-460-1601
NSN 5990-01-136-4068
NSN 6130-00-158-4792
NSN 5990-00-190-4048
NSN 5905-00-503-1779
NSN 5999-01-462-4127
NSN 6240-01-591-5107
NSN 6150-00-233-6356
NSN 6685-01-014-5336