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 6645-00-629-7762
NSN 5855-01-421-1440
NSN 6145-01-238-4979
NSN 6135-01-309-8414
NSN 5895-00-689-6080
NSN 5905-01-273-5450
NSN 2925-01-534-7314
NSN 6220-01-013-4559
NSN 6145-01-153-0888
NSN 6610-01-478-7509
NSN 5915-00-261-9970
NSN 6320-01-225-9963