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 6130-00-399-0729
NSN 6645-01-549-0935
NSN 6620-00-632-3631
NSN 5925-01-521-2940
NSN 5925-01-502-4101
NSN 5965-01-411-9933
NSN 4140-00-504-1829
NSN 5950-01-018-3833
NSN 5930-00-247-0674
NSN 5920-01-241-3227
NSN 5985-00-383-6178
NSN 5999-00-698-0416