Reference manual no. 37013-250
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 5935-01-049-2807
NSN 6135-01-022-5427
NSN 5999-01-390-0999
NSN 5895-01-559-1209
NSN 5930-00-624-4923
NSN 5965-00-096-7370
NSN 5985-01-313-7839
NSN 5930-01-370-1554
NSN 6650-00-935-4247
NSN 6650-01-545-5672
NSN 5835-01-553-6772
NSN 5990-01-239-1474