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 6130-01-433-7008
NSN 5965-00-451-0518
NSN 5985-00-862-1325
NSN 6220-01-632-3851
NSN 5996-00-017-9189
NSN 5910-00-814-1643
NSN 6645-00-736-0476
NSN 7035-01-137-8266
NSN 5996-01-014-8857
NSN 5945-01-117-0025
NSN 5960-01-278-9394
NSN 5999-01-555-1148