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 5998-01-268-8133
NSN 6150-00-882-1019
NSN 6320-01-252-2307
NSN 5920-00-140-1492
NSN 6645-01-606-7684
NSN 5999-01-506-1483
NSN 5945-00-433-7161
NSN 6650-01-485-8536
NSN 6130-01-622-0078
NSN 5960-01-372-5609
NSN 6620-00-426-6884
NSN 5935-00-840-5806