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 5945-01-034-2960
NSN 5925-00-343-6747
NSN 6620-01-412-0938
NSN 6240-01-503-8717
NSN 5985-01-408-9771
NSN 5996-01-151-1607
NSN 5920-00-156-7961
NSN 4140-01-053-5359
NSN 6110-01-343-4538
NSN 6610-01-587-6068
NSN 6620-00-246-1529
NSN 5985-00-553-6532