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 6685-01-574-9348
NSN 6620-00-520-1909
NSN 5925-01-459-4829
NSN 6620-01-556-1399
NSN 5895-01-505-1100
NSN 6220-00-827-0227
NSN 5990-00-644-3365
NSN 6105-00-905-7911
NSN 6130-01-614-3119
NSN 5965-00-043-3463
NSN 5965-01-591-0619
NSN 5835-01-558-9444