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 6150-00-928-0790
NSN 6145-00-839-3895
NSN 5990-01-173-9531
NSN 5998-01-092-1514
NSN 5975-01-347-7892
NSN 7035-01-509-1959
NSN 5835-01-381-2683
NSN 6105-01-185-3958
NSN 2925-01-542-5671
NSN 5835-00-467-7294
NSN 5905-01-443-8508
NSN 5945-01-539-8872