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 6650-01-270-8460
NSN 6110-00-271-9928
NSN 5965-01-147-5655
NSN 5999-01-450-9972
NSN 4140-00-830-4675
NSN 5905-01-055-5582
NSN 5855-01-657-5917
NSN 6645-01-601-1707
NSN 5855-01-632-5485
NSN 5996-01-072-3572
NSN 5920-01-551-1295
NSN 6620-01-534-5588