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 2925-01-141-7563
NSN 5930-00-245-7019
NSN 6145-01-633-3558
NSN 6130-01-310-7993
NSN 5998-01-423-8931
NSN 6150-00-938-8151
NSN 6610-00-377-7956
NSN 5945-01-619-5733
NSN 5925-01-240-8035
NSN 4140-00-205-0853
NSN 5835-01-626-9603
NSN 5990-01-145-2878