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 5905-01-115-8189
NSN 5855-01-203-4719
NSN 5950-00-288-5994
NSN 5915-00-495-0788
NSN 4140-01-302-4487
NSN 4140-00-337-6631
NSN 7035-00-064-7008
NSN 6620-01-576-3717
NSN 4140-01-466-9701
NSN 5960-00-161-9345
NSN 6610-00-987-9716
NSN 5985-01-094-0962