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 6145-00-506-4989
NSN 6645-00-051-4603
NSN 5975-01-342-6061
NSN 5895-01-566-6572
NSN 6220-00-043-3322
NSN 7035-01-476-7787
NSN 6150-00-782-1629
NSN 5960-01-443-4861
NSN 5998-01-225-0561
NSN 6105-01-163-2943
NSN 5915-01-522-4947
NSN 5998-00-797-5054