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 6650-01-147-3125
NSN 4140-01-394-9252
NSN 6220-01-597-2599
NSN 6105-01-660-5355
NSN 6135-01-548-1423
NSN 5998-01-415-1418
NSN 5960-01-359-4257
NSN 5975-01-449-3932
NSN 5895-01-302-0250
NSN 5855-01-513-1859
NSN 5950-01-364-2506
NSN 6610-01-134-4516