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 6620-01-574-1862
NSN 6135-01-210-8715
NSN 5996-00-195-8082
NSN 5925-01-442-5795
NSN 6650-01-428-2251
NSN 5915-00-719-5047
NSN 7035-00-803-3056
NSN 5930-01-357-7600
NSN 6130-00-264-5402
NSN 6110-01-614-3754
NSN 5855-01-354-7291
NSN 6145-01-296-4771