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 5996-01-149-5506
NSN 6105-00-257-2505
NSN 6620-00-730-8699
NSN 5895-01-591-0819
NSN 6105-01-455-1966
NSN 5925-01-442-8589
NSN 5930-00-793-0009
NSN 5915-00-988-0014
NSN 4140-01-122-2423
NSN 5930-00-295-2945
NSN 7035-00-347-5537
NSN 5985-00-914-8256