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 5835-01-412-6901
NSN 5920-00-194-9732
NSN 6135-01-280-2883
NSN 5945-01-046-0346
NSN 6105-00-491-1180
NSN 5910-00-753-7581
NSN 5990-01-380-0650
NSN 6145-01-238-7863
NSN 5855-01-433-5919
NSN 5975-01-537-5872
NSN 5975-01-494-6333
NSN 5930-00-826-2722