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 5945-01-482-7702
NSN 6685-01-213-0211
NSN 7035-00-908-4933
NSN 5990-00-103-0528
NSN 6645-01-008-2720
NSN 2925-01-239-6044
NSN 6130-01-197-0555
NSN 5910-00-832-5392
NSN 5905-01-453-4607
NSN 5990-01-360-0711
NSN 5905-00-839-7004
NSN 5835-01-618-7621