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 5945-01-501-5487
NSN 5960-00-485-0601
NSN 2925-01-614-0476
NSN 6320-01-067-0474
NSN 5895-01-225-0609
NSN 5835-00-870-7034
NSN 6685-01-647-1586
NSN 5835-01-422-2399
NSN 5925-01-509-5850
NSN 5895-01-582-3188
NSN 5945-01-475-0780
NSN 6135-00-209-6918