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 2925-01-184-9604
NSN 6130-00-934-1627
NSN 5996-00-409-4208
NSN 5920-01-206-3977
NSN 5835-01-555-8963
NSN 5975-00-457-0611
NSN 6320-01-384-3850
NSN 5998-01-242-9463
NSN 7035-01-438-2108
NSN 6145-01-555-4409
NSN 6240-01-567-8401
NSN 5965-01-272-4199