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 7035-00-941-4949
NSN 5998-01-420-6855
NSN 5910-01-065-8709
NSN 2925-00-684-7708
NSN 5910-00-121-1696
NSN 5975-01-320-1271
NSN 5945-01-363-0885
NSN 5996-00-805-9340
NSN 5935-01-296-2307
NSN 6650-01-502-6761
NSN 5930-01-560-8783
NSN 5996-00-234-8003