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 5975-01-645-6465
NSN 5996-00-259-0309
NSN 5960-01-451-6993
NSN 6240-01-651-0489
NSN 5985-00-466-3574
NSN 5895-00-373-2743
NSN 6240-00-863-6105
NSN 6650-01-646-0139
NSN 5965-01-449-1101
NSN 6650-01-538-8776
NSN 6150-01-435-5026
NSN 5915-00-288-0071