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 5895-01-165-9396
NSN 5910-01-301-6931
NSN 5905-01-067-4624
NSN 6135-00-577-8429
NSN 7035-01-391-9858
NSN 5895-01-626-8009
NSN 6130-01-605-0942
NSN 5950-00-862-3570
NSN 6645-01-043-9587
NSN 5930-00-739-2077
NSN 5945-00-419-4931
NSN 5999-00-075-5584