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 5985-00-149-1675
NSN 5895-00-203-2379
NSN 6110-00-802-1305
NSN 6620-01-010-7337
NSN 6220-01-381-0081
NSN 5930-00-840-0830
NSN 6685-01-612-5924
NSN 5990-00-195-9460
NSN 6135-00-112-8637
NSN 5965-01-252-8701
NSN 5990-01-617-5156
NSN 5998-01-634-0604