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 7035-00-908-4933
NSN 6645-00-340-4795
NSN 5915-01-593-5798
NSN 6150-01-162-4605
NSN 5975-01-227-1809
NSN 7035-01-383-6549
NSN 6610-01-602-9619
NSN 5895-00-936-6489
NSN 5915-01-220-7337
NSN 5905-01-196-9366
NSN 5960-01-350-2925
NSN 6645-01-480-3347