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 5999-01-646-2264
NSN 6645-01-199-0062
NSN 6130-01-157-9307
NSN 5835-01-568-7796
NSN 5910-01-195-0668
NSN 6685-00-019-0552
NSN 6110-01-523-0229
NSN 5996-01-251-4900
NSN 5960-01-030-6407
NSN 6685-00-544-3783
NSN 6685-01-630-8171
NSN 6110-00-238-9636