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 6620-01-655-7664
NSN 6220-00-546-1836
NSN 5985-00-189-7138
NSN 6240-01-472-2950
NSN 5985-01-552-0960
NSN 6240-00-879-0771
NSN 4140-00-523-9058
NSN 5915-00-202-5192
NSN 6685-01-152-2846
NSN 5975-01-624-8035
NSN 6130-00-369-1627
NSN 6320-01-607-1491