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 5945-01-160-7861
NSN 6220-01-398-1087
NSN 5835-00-733-9145
NSN 6135-00-683-0536
NSN 6685-01-130-5582
NSN 6135-01-032-8887
NSN 6650-01-213-1231
NSN 5996-00-984-1322
NSN 5855-00-451-6155
NSN 5985-01-444-3769
NSN 6110-00-596-9124
NSN 6650-01-163-5474