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 5945-00-115-8569
NSN 6610-01-457-1974
NSN 6105-00-394-6803
NSN 6130-01-551-8759
NSN 6110-00-702-4563
NSN 6150-01-634-0575
NSN 6145-01-422-4371
NSN 5950-00-501-9448
NSN 6645-00-269-2764
NSN 5975-01-473-7811
NSN 5965-01-467-7974
NSN 5930-01-549-8160