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 5999-00-648-0062
NSN 5920-01-209-2219
NSN 6150-01-456-1288
NSN 5920-00-518-4452
NSN 6105-01-173-6972
NSN 7035-01-293-3431
NSN 5996-00-983-5549
NSN 6220-01-123-9290
NSN 6220-01-444-3972
NSN 5910-01-487-3735
NSN 6685-01-157-6932
NSN 6130-01-283-7914