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 2925-00-156-8963
NSN 2925-01-129-1261
NSN 5975-01-449-8300
NSN 6645-00-081-4298
NSN 5855-00-586-6255
NSN 6685-01-510-7773
NSN 6320-01-512-2031
NSN 4140-00-300-8111
NSN 7035-01-445-3563
NSN 5990-00-707-0731
NSN 4140-01-211-8673
NSN 5999-01-468-3651