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 6320-00-456-0836
NSN 5965-01-463-2815
NSN 5905-01-436-1192
NSN 5915-01-175-4834
NSN 5965-00-826-1841
NSN 7035-01-556-6855
NSN 6685-00-435-9487
NSN 6620-00-816-8240
NSN 6240-01-318-5771
NSN 5998-00-945-1014
NSN 6240-01-519-2935
NSN 6620-01-163-8808