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 5905-01-576-6249
NSN 5960-01-430-3911
NSN 5998-00-058-7816
NSN 6130-01-318-4321
NSN 5935-01-436-1429
NSN 6110-01-331-6957
NSN 6110-01-361-9734
NSN 6320-01-343-8191
NSN 6145-00-871-9112
NSN 6110-01-481-2807
NSN 6320-01-322-1310
NSN 6685-01-509-4743