We deeply thank you for your using NBK website.
We would like to announce that torque transmission on stainless coupling, “XBWS”・“XBSS” will be changed. NBK employs high strength stainless bolt “YUS-550” for assembling.
However, this bolt will be no longer in production. Hence, we are afraid but we have no choice to switch assembly bolt from “YUS-550” to “SUS-XM7”. As a result, it will cause to change tensile strength rank and coupling transmission torque. Moreover, Part No. Will be amended due to the change of coupling mechanical property.

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We are sorry for any inconvenience this may cause you and appreciate your cooperation and understanding.