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 5999-01-191-9045
NSN 6110-00-941-6143
NSN 6135-01-388-2581
NSN 6650-00-054-4721
NSN 6620-00-413-4695
NSN 6135-01-472-9011
NSN 6150-01-112-0540
NSN 7035-01-186-0024
NSN 5925-01-316-4986
NSN 6620-01-078-6372
NSN 5965-00-615-7118
NSN 5925-01-627-7481