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 5910-01-546-0277
NSN 6645-01-530-3654
NSN 6685-01-106-6051
NSN 6645-01-619-0524
NSN 5905-01-556-9578
NSN 5915-01-023-6936
NSN 6610-01-178-0333
NSN 6650-00-562-0291
NSN 5915-01-452-1902
NSN 6105-01-470-4090
NSN 6620-01-087-2354
NSN 5905-01-435-5168