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 6685-00-708-2136
NSN 5998-01-594-3533
NSN 7035-00-320-5644
NSN 5990-00-977-9261
NSN 6240-00-527-8614
NSN 6105-01-310-8468
NSN 5975-01-063-4101
NSN 5920-01-010-4855
NSN 6220-00-149-0977
NSN 5975-00-221-0579
NSN 6110-00-930-8191
NSN 5990-01-425-2175