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 6220-01-178-8249
NSN 5965-01-451-7313
NSN 6620-01-631-0700
NSN 5965-01-519-8758
NSN 5950-01-541-3737
NSN 5960-01-245-6088
NSN 5910-00-865-3610
NSN 6320-01-029-2196
NSN 6105-01-412-0811
NSN 5950-01-139-6040
NSN 5935-00-558-4755
NSN 5950-01-554-5761