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 6135-00-134-6648
NSN 6685-01-456-3717
NSN 5915-00-291-3736
NSN 6650-01-381-3542
NSN 6135-01-415-4124
NSN 5905-00-989-5662
NSN 5950-01-521-4760
NSN 5999-01-369-2737
NSN 5945-01-472-2941
NSN 5835-00-572-7445
NSN 6110-01-409-2031
NSN 5855-01-213-9076