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 6135-01-445-6589
NSN 5975-00-780-5123
NSN 5998-00-920-7684
NSN 5930-01-523-1656
NSN 5960-01-462-7704
NSN 6320-00-483-0451
NSN 5975-00-186-8884
NSN 6145-01-472-2228
NSN 5905-01-474-6420
NSN 2925-01-583-5619
NSN 5855-01-603-3309
NSN 6135-01-348-8264