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 5998-00-413-1239
NSN 5910-01-329-7677
NSN 5835-00-958-6231
NSN 6645-01-590-5534
NSN 5835-01-180-1400
NSN 2925-01-356-6017
NSN 5960-01-314-7757
NSN 6620-00-246-5159
NSN 5990-00-804-0678
NSN 4140-01-024-7129
NSN 6130-01-029-3601
NSN 5930-01-179-6676