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 6320-01-407-8663
NSN 6135-00-269-5843
NSN 5930-01-469-0218
NSN 6135-00-010-5275
NSN 5960-00-151-7576
NSN 6650-00-777-8225
NSN 6220-00-140-5638
NSN 6105-01-279-2397
NSN 5950-01-138-1954
NSN 5975-01-253-2452
NSN 6110-00-752-2757
NSN 5996-01-517-8622