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 5990-01-235-8404
NSN 6650-01-505-5531
NSN 6105-01-581-4009
NSN 5945-01-592-8360
NSN 7035-00-523-7492
NSN 6610-01-424-3213
NSN 6650-01-364-4616
NSN 2925-00-005-1618
NSN 6650-00-944-1399
NSN 5930-01-217-3561
NSN 5945-01-170-4107
NSN 6320-01-576-6310