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 5930-00-221-8370
NSN 5915-00-552-1779
NSN 6130-01-508-7447
NSN 5950-01-406-2849
NSN 5975-01-174-4012
NSN 6135-01-193-3892
NSN 6150-01-634-0575
NSN 6110-01-027-5078
NSN 6685-01-322-5688
NSN 6105-00-624-8362
NSN 7035-01-281-3642
NSN 5965-01-643-5191