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 6620-01-557-6512
NSN 5935-01-617-2310
NSN 5930-00-871-8780
NSN 6650-00-078-5773
NSN 6240-01-012-3976
NSN 6135-01-285-1925
NSN 6130-01-414-5369
NSN 5930-01-297-1522
NSN 6650-01-612-1457
NSN 5920-00-910-0315
NSN 5935-00-271-9531
NSN 6110-01-450-1679