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 6610-00-757-4673
NSN 5920-00-491-2795
NSN 6320-01-370-5222
NSN 5985-01-286-6355
NSN 5990-01-200-7460
NSN 6240-01-409-2465
NSN 5895-01-337-4597
NSN 5996-01-633-7979
NSN 6650-00-035-9297
NSN 6220-00-847-9560
NSN 5835-00-870-7034
NSN 6610-01-347-3397