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 6105-01-204-0671
NSN 5999-01-261-2266
NSN 5915-00-318-1356
NSN 5998-00-245-3984
NSN 5998-00-270-1179
NSN 6645-00-692-2809
NSN 5996-01-181-2697
NSN 6110-01-117-5900
NSN 6650-01-278-2151
NSN 6220-01-099-3429
NSN 6620-01-065-4527
NSN 6320-01-438-6280