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 5945-01-600-6760
NSN 5985-01-071-1387
NSN 5930-01-261-5360
NSN 6685-01-141-7034
NSN 5925-01-323-7756
NSN 5965-01-256-6745
NSN 5998-01-200-7207
NSN 5945-01-488-9433
NSN 5950-01-158-5637
NSN 5835-01-143-9143
NSN 6320-01-119-3935
NSN 5905-01-537-1903