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 6105-01-331-6868
NSN 6685-01-269-0526
NSN 5985-01-530-6482
NSN 5905-01-125-3656
NSN 6645-01-199-0062
NSN 6610-01-010-3159
NSN 6620-01-593-8738
NSN 5920-01-017-5438
NSN 6240-01-037-7108
NSN 5950-01-524-9831
NSN 5895-01-293-1140
NSN 6135-01-238-2878