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 6220-00-156-4469
NSN 5996-01-425-7907
NSN 5990-00-067-6791
NSN 6220-01-160-7249
NSN 6610-01-376-3993
NSN 6650-00-824-5265
NSN 5999-01-293-1142
NSN 6645-01-196-6277
NSN 5945-01-388-0575
NSN 5935-01-230-0471
NSN 5996-01-371-9431
NSN 6220-01-248-2984