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 5996-01-357-7181
NSN 5945-01-278-3379
NSN 5975-01-235-3856
NSN 5998-01-445-8835
NSN 5996-01-521-4007
NSN 6220-01-377-5645
NSN 6220-00-827-0227
NSN 5999-01-043-4004
NSN 6610-00-734-3604
NSN 5835-00-398-9678
NSN 6130-01-433-2215
NSN 2925-01-345-9439