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 6220-01-592-3183
NSN 5935-00-905-4108
NSN 5960-01-139-0293
NSN 5905-00-532-2111
NSN 6130-01-502-4284
NSN 6240-01-212-9756
NSN 5985-01-126-8273
NSN 5998-00-957-1126
NSN 5910-00-997-2853
NSN 5945-01-467-9886
NSN 6130-01-076-5612
NSN 5925-00-964-9654