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 6130-00-998-1610
NSN 6240-01-489-5806
NSN 5996-01-194-5249
NSN 6685-00-591-7649
NSN 5985-01-451-9482
NSN 6135-01-441-7922
NSN 5996-00-808-5563
NSN 6110-01-035-9228
NSN 5996-01-514-7341
NSN 5945-01-362-0685
NSN 6620-00-333-5503
NSN 6110-00-193-0030