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 6240-01-384-8802
NSN 5910-01-424-6355
NSN 5999-01-044-4941
NSN 6135-01-032-8887
NSN 5975-00-276-7559
NSN 6685-00-105-3928
NSN 5975-01-545-7403
NSN 5998-00-683-1333
NSN 5985-01-265-1879
NSN 5985-01-258-7037
NSN 5975-01-493-3961
NSN 5930-01-160-7069