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 6150-01-533-6583
NSN 6650-00-839-2527
NSN 5975-00-481-3681
NSN 5920-00-126-1873
NSN 6645-01-535-7136
NSN 6650-01-187-5937
NSN 6105-00-169-8773
NSN 5965-01-381-2998
NSN 7035-01-536-8236
NSN 5925-01-433-5323
NSN 5925-00-018-9198
NSN 6650-00-434-0188