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 7035-00-437-7950
NSN 6240-01-406-4042
NSN 5950-01-364-0006
NSN 5996-01-053-1617
NSN 5945-01-122-1527
NSN 6620-01-623-2530
NSN 5999-01-180-0294
NSN 5920-01-140-1120
NSN 6110-01-544-1805
NSN 6220-01-109-5094
NSN 5945-01-589-0669
NSN 5975-01-420-8392