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 6620-00-098-5652
NSN 6220-01-634-0660
NSN 5960-01-373-5313
NSN 6240-00-284-1457
NSN 6650-01-618-0680
NSN 6135-01-339-4695
NSN 6320-01-198-4024
NSN 5999-01-381-7881
NSN 2925-01-380-0869
NSN 5996-00-494-3621
NSN 5985-00-232-0692
NSN 6650-01-441-7790