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 6320-01-255-2096
NSN 6220-01-322-6424
NSN 6620-00-708-3323
NSN 5998-01-259-8436
NSN 5985-00-759-9889
NSN 5915-01-272-9494
NSN 6220-00-366-1670
NSN 5915-00-361-9148
NSN 5985-00-800-5438
NSN 5945-01-451-4798
NSN 5965-01-304-7179
NSN 5985-00-208-6751