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 5835-01-342-7975
NSN 5910-01-526-2733
NSN 6110-01-446-7126
NSN 5915-00-432-0645
NSN 6135-00-519-1325
NSN 6650-01-205-6623
NSN 6130-01-556-4260
NSN 6145-00-916-2042
NSN 5990-00-736-8778
NSN 6650-00-963-1692
NSN 7035-00-205-1932
NSN 6320-00-476-6898