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 6130-00-692-2916
NSN 5905-01-643-7986
NSN 6135-00-110-1981
NSN 6320-01-072-2073
NSN 6105-01-514-2294
NSN 5930-01-126-0066
NSN 5960-01-024-7918
NSN 6105-00-725-9222
NSN 5950-01-254-8149
NSN 6240-01-606-1850
NSN 5998-01-074-9970
NSN 6130-01-261-6861