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 5990-01-060-3687
NSN 6145-00-763-6077
NSN 5930-00-397-4164
NSN 5996-01-512-2040
NSN 5925-01-177-4636
NSN 5925-00-825-6068
NSN 5990-01-199-2846
NSN 6105-00-330-0882
NSN 5855-01-464-1926
NSN 6135-01-629-6940
NSN 5999-01-476-5185
NSN 2925-01-330-2988