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 5910-01-429-4648
NSN 5996-01-555-7690
NSN 5965-01-523-5998
NSN 2925-01-604-8984
NSN 5945-01-536-1443
NSN 6620-00-872-5032
NSN 6620-00-635-7347
NSN 2925-00-737-6476
NSN 5920-01-311-3072
NSN 5999-01-206-4657
NSN 5945-00-705-4976
NSN 5998-00-700-0590