Material is steel, federal standard no. 66; steel no.S 1008 to 1022
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 6650-01-449-1413
NSN 6620-00-613-3023
NSN 5998-00-080-0751
NSN 5930-01-292-2079
NSN 5985-01-286-3690
NSN 5935-00-047-4079
NSN 5910-01-307-4450
NSN 5905-01-399-4051
NSN 5915-01-162-9199
NSN 5996-00-954-0556
NSN 5835-00-725-2087
NSN 5985-00-789-4456