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 5905-01-524-7726
NSN 5915-00-291-3736
NSN 5920-01-170-2780
NSN 6150-01-148-1391
NSN 5915-01-600-5982
NSN 5999-01-108-1055
NSN 5920-01-424-0745
NSN 6150-01-139-4725
NSN 5990-01-655-1437
NSN 6135-01-510-4663
NSN 6145-01-199-9554
NSN 4140-01-476-5436