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 6110-00-831-1509
NSN 6685-00-233-0736
NSN 6135-01-453-5069
NSN 5965-00-823-8623
NSN 6150-01-020-7881
NSN 5985-01-141-7059
NSN 5835-01-535-0948
NSN 5925-01-466-6263
NSN 5985-01-317-6228
NSN 6105-01-531-3358
NSN 6220-01-634-0660
NSN 6610-01-327-0500