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 5975-01-187-5403
NSN 5905-01-097-7872
NSN 5960-01-333-8428
NSN 6105-01-428-6761
NSN 6130-01-239-4596
NSN 5990-01-287-1682
NSN 5945-00-398-1072
NSN 5998-00-399-2830
NSN 5990-00-890-3822
NSN 6130-00-266-7496
NSN 5960-01-425-1454
NSN 2925-00-065-9986