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 5975-00-257-2793
NSN 5905-00-610-5698
NSN 6130-01-551-2560
NSN 5999-00-071-5058
NSN 5985-01-634-0635
NSN 6320-01-409-1388
NSN 6650-00-773-0234
NSN 6645-01-088-5244
NSN 5930-00-347-9100
NSN 5905-01-273-5450
NSN 5895-00-455-8952
NSN 5930-00-853-1943