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 5905-01-431-8726
NSN 5990-01-347-6080
NSN 5985-00-245-8753
NSN 6130-01-597-7041
NSN 6645-01-308-9349
NSN 6685-01-095-5088
NSN 6220-00-876-8325
NSN 5920-00-752-3081
NSN 6320-01-067-0474
NSN 5945-00-201-2975
NSN 5990-00-939-8890
NSN 5945-00-815-9386