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 5835-01-040-5201
NSN 5996-00-960-8252
NSN 5950-00-258-0220
NSN 6610-00-009-2736
NSN 5910-01-574-9765
NSN 6620-01-521-9146
NSN 6110-00-898-3223
NSN 5920-00-903-8503
NSN 5960-01-350-5332
NSN 6650-01-437-8852
NSN 5930-00-652-2769
NSN 5999-00-312-3580