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 5935-01-634-0668
NSN 6240-00-921-4493
NSN 5998-01-435-2774
NSN 5965-00-951-9961
NSN 6645-01-390-6520
NSN 5835-00-223-7235
NSN 6220-01-409-1585
NSN 5910-01-146-4317
NSN 6150-00-661-0184
NSN 5990-01-443-2931
NSN 6685-01-341-9325
NSN 5996-01-534-7687