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 5915-01-363-9524
NSN 6105-01-623-1922
NSN 5960-00-237-2655
NSN 4140-01-469-7519
NSN 5910-00-138-2795
NSN 2925-00-791-8776
NSN 5985-00-242-2684
NSN 5996-01-519-7548
NSN 5905-00-771-6338
NSN 2925-00-258-9786
NSN 6130-01-585-9907
NSN 5975-01-232-1007