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 6320-01-491-0327
NSN 6135-01-632-2740
NSN 6620-01-411-0390
NSN 6220-00-844-7528
NSN 5835-01-233-7033
NSN 5998-01-386-4467
NSN 6130-01-308-7643
NSN 5990-00-518-3195
NSN 6645-00-079-1430
NSN 6105-00-995-3345
NSN 5920-00-568-0926
NSN 5935-00-058-3963