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 5999-00-916-5533
NSN 5965-01-624-0785
NSN 6130-01-595-6760
NSN 6145-00-073-5205
NSN 6620-01-364-0195
NSN 5835-00-387-4759
NSN 5855-00-411-8688
NSN 4140-00-997-1599
NSN 6145-00-372-3713
NSN 5855-01-533-7051
NSN 5999-00-491-9170
NSN 5998-01-524-4394