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 5945-01-479-5417
NSN 6650-01-206-3584
NSN 6130-01-191-5856
NSN 5998-01-327-1274
NSN 5975-01-121-1596
NSN 5945-01-013-8440
NSN 6105-01-163-8827
NSN 5965-00-444-6544
NSN 6685-01-257-2864
NSN 6220-00-005-1436
NSN 4140-01-318-3087
NSN 5990-01-492-0215