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 6320-01-143-3597
NSN 5998-00-061-2861
NSN 7035-01-617-0072
NSN 5950-00-949-4242
NSN 6135-01-613-1464
NSN 2925-01-214-5333
NSN 5965-01-508-2537
NSN 5905-00-206-1943
NSN 2925-00-938-3797
NSN 6145-00-786-7980
NSN 5910-01-043-0589
NSN 6145-01-200-7936