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 5950-01-428-4020
NSN 6320-01-607-1491
NSN 6240-01-265-6958
NSN 5905-01-578-2604
NSN 6320-01-278-9832
NSN 6240-01-371-4263
NSN 5915-01-122-0809
NSN 5855-00-631-4565
NSN 5930-01-323-6505
NSN 5965-01-222-1420
NSN 5920-01-235-0704
NSN 6610-00-960-9135