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 6145-01-366-5902
NSN 6135-00-299-6918
NSN 5960-01-123-9553
NSN 4140-01-044-6064
NSN 6110-01-310-9526
NSN 5905-00-805-6266
NSN 5930-01-450-9271
NSN 5930-01-238-9068
NSN 2925-01-208-3639
NSN 5965-01-391-9492
NSN 5950-01-445-6004
NSN 5975-01-556-5464