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 5985-00-692-1550
NSN 5985-01-612-4195
NSN 5998-00-553-7172
NSN 6650-01-421-4024
NSN 6135-01-319-5567
NSN 5925-01-231-9509
NSN 5935-01-332-7467
NSN 5935-00-783-8020
NSN 5950-01-355-0403
NSN 6135-00-284-1406
NSN 5996-01-014-1703
NSN 5915-00-269-9252