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 5985-00-411-6693
NSN 6320-00-270-8222
NSN 5925-00-239-2135
NSN 5915-00-345-8957
NSN 5855-01-060-2820
NSN 4140-01-105-2017
NSN 5905-01-429-0102
NSN 5855-00-288-1408
NSN 6145-00-181-9634
NSN 5920-01-399-4555
NSN 6320-00-149-7570
NSN 5910-01-227-1939