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 5905-01-565-3570
NSN 5905-01-363-9891
NSN 6610-01-418-5787
NSN 6620-00-556-8341
NSN 5965-00-241-2521
NSN 6150-01-607-5023
NSN 5930-00-242-2006
NSN 5935-01-099-8382
NSN 6135-01-570-4284
NSN 5999-01-442-6899
NSN 5998-01-469-8618
NSN 4140-01-578-3148