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 2925-00-497-7808
NSN 6135-01-567-0739
NSN 5996-00-525-1777
NSN 5905-01-486-3113
NSN 6650-01-265-0650
NSN 6105-00-446-9092
NSN 2925-00-828-5301
NSN 5990-01-020-6841
NSN 5999-01-045-5884
NSN 6650-00-732-5031
NSN 6645-00-372-2618
NSN 5990-00-827-0684