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 5935-00-478-4437
NSN 5950-01-197-8290
NSN 6320-01-466-4175
NSN 6220-01-089-7185
NSN 5999-00-143-6978
NSN 5990-01-027-0568
NSN 5895-01-607-6304
NSN 6610-01-100-8128
NSN 5930-00-964-7363
NSN 5998-01-571-0588
NSN 6645-01-425-1673
NSN 6105-01-479-0060