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 6130-00-890-8471
NSN 6645-00-143-1567
NSN 5996-01-154-1064
NSN 5855-01-632-9530
NSN 5905-01-133-5436
NSN 5895-00-653-4227
NSN 6150-01-480-2384
NSN 6220-01-456-9499
NSN 5855-01-490-5384
NSN 5960-01-177-7406
NSN 5950-00-390-1074
NSN 5996-01-091-1968