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 5905-01-520-9429
NSN 5910-01-624-5690
NSN 6105-01-280-8799
NSN 6135-01-512-8740
NSN 6645-01-090-2555
NSN 6105-01-274-0509
NSN 6130-01-155-8926
NSN 5945-01-353-1402
NSN 6110-01-366-9639
NSN 5935-00-549-6838
NSN 5990-00-578-8850
NSN 5945-01-151-1714