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 5925-00-256-4884
NSN 5920-01-056-5481
NSN 6105-01-570-0351
NSN 6135-00-921-6487
NSN 5998-00-651-6212
NSN 6650-00-590-9073
NSN 6650-01-060-0326
NSN 5925-00-450-6372
NSN 6130-01-545-4007
NSN 5895-00-406-7671
NSN 6620-01-319-9804
NSN 7035-00-870-0290