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 5998-00-988-5298
NSN 5945-00-368-8202
NSN 6685-01-535-4379
NSN 2925-00-520-9546
NSN 6110-01-579-1519
NSN 4140-00-606-9453
NSN 6685-01-601-1876
NSN 5945-00-636-9934
NSN 6610-01-585-4068
NSN 5996-00-376-5442
NSN 5930-01-133-5091
NSN 5930-01-406-8731