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 5996-01-572-9530
NSN 5965-01-353-6380
NSN 5945-01-399-5980
NSN 5998-01-003-3911
NSN 6610-01-592-5945
NSN 6105-01-367-6005
NSN 7035-01-633-9537
NSN 4140-00-464-7890
NSN 5945-01-406-3200
NSN 6110-01-164-8480
NSN 5915-00-508-1259
NSN 6645-01-393-9215