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 5920-01-524-0222
NSN 5945-01-014-0229
NSN 5985-01-449-1356
NSN 5990-01-281-9784
NSN 5998-01-355-6153
NSN 6110-00-967-9007
NSN 2925-01-180-7793
NSN 6685-00-420-2781
NSN 5910-00-930-6170
NSN 5935-00-043-4749
NSN 4140-00-597-5260
NSN 5960-00-170-6916