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 5998-01-616-0662
NSN 6645-01-473-1371
NSN 6320-01-578-6006
NSN 5950-00-004-7738
NSN 5965-00-051-6434
NSN 6105-00-193-1662
NSN 6135-00-945-0015
NSN 5920-00-880-6581
NSN 6110-01-228-2892
NSN 5996-01-316-7042
NSN 6645-00-869-0850
NSN 5855-01-561-2677