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 6135-01-539-9009
NSN 5999-01-273-9788
NSN 5895-01-098-5329
NSN 5996-01-072-9905
NSN 6145-01-472-2228
NSN 6650-00-767-7597
NSN 6685-00-621-5011
NSN 5990-00-972-1404
NSN 5998-01-442-8318
NSN 6685-01-424-8046
NSN 5990-01-120-1910
NSN 5950-00-228-4996