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 6645-01-529-8822
NSN 6650-01-399-8552
NSN 6620-01-215-0470
NSN 6620-01-447-6666
NSN 7035-01-319-1379
NSN 6110-01-602-4068
NSN 5915-00-599-9162
NSN 6145-01-525-8140
NSN 5910-01-630-5595
NSN 5930-01-295-4428
NSN 5855-00-149-0766
NSN 5950-01-315-1109