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 5960-00-529-2704
NSN 6135-01-494-8657
NSN 5990-01-510-4699
NSN 5950-00-843-9461
NSN 5910-01-546-4449
NSN 5960-01-061-9166
NSN 6685-01-412-0767
NSN 5999-00-984-0602
NSN 7035-01-477-0501
NSN 7035-01-146-1578
NSN 5905-00-142-3831
NSN 5950-00-016-4927