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 6135-01-168-2944
NSN 6240-01-017-8281
NSN 6105-01-025-3369
NSN 6320-01-470-6826
NSN 6650-01-041-4979
NSN 6645-01-508-0345
NSN 5915-01-196-5830
NSN 5945-00-468-7995
NSN 6650-01-207-2905
NSN 5975-00-956-3357
NSN 5920-01-433-8060
NSN 6650-01-584-8644