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 6320-00-194-4252
NSN 5920-01-016-2764
NSN 5895-01-106-5054
NSN 5998-01-643-6278
NSN 6240-01-341-9070
NSN 5975-01-023-1707
NSN 5920-00-410-7084
NSN 6130-00-952-1803
NSN 5998-01-486-0269
NSN 6135-01-442-4581
NSN 6240-01-285-7857
NSN 5945-01-416-8131