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 6130-01-473-1805
NSN 6135-01-225-9827
NSN 5920-01-066-3709
NSN 5990-01-074-2210
NSN 2925-01-556-0333
NSN 5855-01-371-6790
NSN 6150-01-527-9332
NSN 5996-00-205-0211
NSN 6110-01-212-9568
NSN 6145-01-474-5459
NSN 5996-01-178-7734
NSN 6620-01-135-0090