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 5910-01-229-6145
NSN 6650-00-626-1891
NSN 6620-01-412-0938
NSN 5960-01-182-1863
NSN 5999-01-058-0792
NSN 5975-01-173-6936
NSN 5960-00-280-5585
NSN 6610-00-703-8233
NSN 5895-01-069-3718
NSN 5999-01-069-2594
NSN 5965-01-076-8026
NSN 5895-01-562-8109