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 6145-00-307-7501
NSN 6135-01-651-7287
NSN 5999-01-133-4963
NSN 6130-00-457-0593
NSN 6645-01-371-1632
NSN 5985-01-175-7329
NSN 5999-01-150-5805
NSN 6240-01-612-4236
NSN 6240-01-412-6426
NSN 6145-01-577-0935
NSN 4140-01-207-0452
NSN 5965-00-665-2156