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 6135-00-087-5300
NSN 5920-01-157-9471
NSN 6135-01-658-7467
NSN 5925-01-576-5407
NSN 6620-01-547-6088
NSN 6150-01-102-4008
NSN 5998-01-544-6069
NSN 4140-01-220-7697
NSN 6685-00-481-9852
NSN 5998-01-170-2298
NSN 6135-01-443-4484
NSN 5855-01-484-9948