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 5999-00-325-2040
NSN 5998-00-695-4920
NSN 5920-01-590-0493
NSN 5950-00-290-8090
NSN 5915-00-880-6584
NSN 5965-00-111-2073
NSN 5996-01-087-0414
NSN 5960-01-546-2379
NSN 5990-01-285-4633
NSN 6685-01-129-4815
NSN 6220-01-191-5703
NSN 6620-00-073-6265