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 5905-01-643-6092
NSN 6220-01-620-9249
NSN 5855-01-512-1926
NSN 6650-00-398-1821
NSN 6610-01-051-4735
NSN 6650-00-977-7533
NSN 5920-01-265-4002
NSN 6320-01-362-9518
NSN 6240-01-092-1326
NSN 5950-00-378-0398
NSN 4140-01-326-1024
NSN 7035-01-018-9629