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 5905-01-524-7726
NSN 5935-00-104-7528
NSN 5985-01-371-3067
NSN 6650-00-775-6560
NSN 5975-00-813-5554
NSN 5990-01-485-0260
NSN 6145-01-318-3084
NSN 7035-00-300-3208
NSN 6145-01-648-4219
NSN 6105-01-113-1446
NSN 5915-00-254-2638
NSN 2925-00-969-4262