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 5905-01-370-3397
NSN 5999-00-150-2312
NSN 6145-01-558-7876
NSN 5905-01-268-3877
NSN 5895-00-989-3586
NSN 5910-00-132-2649
NSN 5925-00-923-4268
NSN 5855-00-962-5792
NSN 6135-01-462-6040
NSN 5905-01-082-1848
NSN 2925-01-440-9912
NSN 6105-00-489-1305