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 5910-01-194-1621
NSN 5975-00-792-3462
NSN 6650-01-146-5000
NSN 6620-01-522-5717
NSN 5835-01-416-6449
NSN 6645-00-388-3463
NSN 5985-00-342-9140
NSN 6130-00-619-1532
NSN 7035-01-461-5683
NSN 6240-01-465-1355
NSN 6105-01-020-0600
NSN 5855-01-445-7980