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 5998-01-273-7200
NSN 5920-01-483-1196
NSN 6320-00-116-3658
NSN 6645-01-234-7459
NSN 5945-00-809-2461
NSN 5999-00-925-3819
NSN 5915-01-059-1178
NSN 5915-00-914-5341
NSN 6240-01-091-0264
NSN 7035-01-528-7870
NSN 5915-00-518-4656
NSN 5915-01-115-5120