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 5935-01-393-9705
NSN 6130-01-357-7918
NSN 5935-01-503-2862
NSN 5975-01-578-4901
NSN 5985-01-478-5332
NSN 5975-00-274-3772
NSN 6645-01-255-7024
NSN 5998-00-455-6765
NSN 5835-00-977-1254
NSN 5935-00-167-7723
NSN 4140-01-101-6864
NSN 6135-01-529-8523