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 6610-00-160-3315
NSN 6240-00-458-4662
NSN 5998-01-415-1208
NSN 5925-01-392-4785
NSN 5915-00-407-7997
NSN 5990-01-492-6575
NSN 5998-00-406-6512
NSN 5945-00-833-8948
NSN 6220-01-117-8510
NSN 5905-00-156-2982
NSN 5920-00-288-5849
NSN 5895-01-085-6168