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 6135-01-506-0759
NSN 5998-00-448-4478
NSN 5925-00-546-8965
NSN 5935-01-213-0777
NSN 5965-01-575-8900
NSN 5985-01-049-0370
NSN 4140-01-233-4804
NSN 5999-01-055-4947
NSN 5945-00-979-9158
NSN 5965-01-255-4192
NSN 5905-01-313-0519
NSN 5835-00-581-9460