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 6650-00-399-2005
NSN 5905-00-394-1528
NSN 5905-00-855-6539
NSN 6240-01-534-5829
NSN 5999-01-461-8731
NSN 5895-00-525-3295
NSN 6610-01-310-3313
NSN 6220-00-353-5730
NSN 6320-00-070-4544
NSN 6150-01-588-3473
NSN 6135-01-503-1688
NSN 7035-00-517-8232