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 5990-00-930-4665
NSN 6110-00-188-9874
NSN 6145-00-583-3940
NSN 5930-01-312-2217
NSN 5996-00-222-9632
NSN 5935-00-518-3029
NSN 6320-01-564-0893
NSN 6620-00-946-1438
NSN 5895-00-870-5598
NSN 5910-01-207-9782
NSN 5998-01-229-1699
NSN 5999-01-027-0773