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 5999-01-330-4240
NSN 5999-00-800-6123
NSN 5965-01-388-1379
NSN 5999-00-702-5474
NSN 6110-01-035-0427
NSN 5945-01-388-2953
NSN 5960-01-386-5770
NSN 6130-01-451-3931
NSN 6220-01-087-5115
NSN 5945-00-887-2391
NSN 5950-00-859-6868
NSN 6650-01-276-2869