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 5835-01-541-9991
NSN 5996-01-212-4103
NSN 6105-00-935-8736
NSN 6150-01-555-8742
NSN 6610-00-167-0952
NSN 5960-01-632-6576
NSN 5910-01-237-8989
NSN 5930-01-390-4024
NSN 6650-01-318-9413
NSN 6645-01-437-7770
NSN 5960-01-536-9763
NSN 6130-01-573-6156