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 5895-00-682-9339
NSN 6145-01-222-7531
NSN 5975-01-490-6741
NSN 4140-01-618-6417
NSN 4140-01-158-4139
NSN 5998-01-250-9819
NSN 6645-01-613-2053
NSN 6220-01-121-7391
NSN 5990-01-446-9118
NSN 6610-00-107-1944
NSN 5920-00-802-0666
NSN 6320-00-377-5683