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 6610-01-561-5604
NSN 5835-01-411-7050
NSN 5915-00-107-0253
NSN 5855-01-433-4393
NSN 6145-00-136-9132
NSN 5996-01-038-8474
NSN 6130-01-316-3648
NSN 6220-01-487-7690
NSN 6650-01-610-3013
NSN 5915-00-269-2748
NSN 4140-01-608-0032
NSN 5998-01-119-0120