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 5998-01-059-5905
NSN 5996-01-251-0249
NSN 6320-01-117-5516
NSN 6220-01-239-9079
NSN 7035-00-727-4068
NSN 6135-01-529-3789
NSN 4140-01-432-8726
NSN 5998-00-364-7836
NSN 6645-00-233-4286
NSN 6645-00-108-6479
NSN 5990-01-633-9503
NSN 5930-01-324-4934