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 6620-00-079-0311
NSN 6650-01-294-5243
NSN 5945-01-579-3801
NSN 5996-00-503-5306
NSN 5915-01-420-7442
NSN 5999-01-367-9855
NSN 5855-00-087-7833
NSN 5930-01-144-1624
NSN 6240-01-142-2963
NSN 6145-01-328-5284
NSN 5915-01-534-3397
NSN 5996-01-491-6739