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 6105-01-374-4794
NSN 5935-00-154-2414
NSN 5998-01-289-7690
NSN 2925-01-164-4197
NSN 2925-01-348-8306
NSN 6135-01-324-2505
NSN 6240-00-072-8445
NSN 6645-01-251-3986
NSN 2925-01-088-3612
NSN 6240-01-099-2472
NSN 5835-01-615-4766
NSN 6105-01-564-1859