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 6650-00-197-7563
NSN 6130-01-329-4433
NSN 6685-01-287-8062
NSN 6610-01-633-8931
NSN 5960-00-405-4608
NSN 5915-01-112-0728
NSN 5990-00-022-8146
NSN 6650-01-116-5856
NSN 6145-01-447-3678
NSN 6610-01-102-2256
NSN 5990-00-479-9157
NSN 6320-01-498-4954