SMK40UU Square Flange Type Slide Bush Made in Japan:NB Linear Systems Nippon Bearing Linear Systems. SMK40UU Square Linear Slide Bush, The retainer material is steel, It is seals on both sides, series mainly used in the USA, NB brand (Nippon Bearing Linear Systems), Made in Japan. X x Y x Z. 9 x 14 x 8.1.The item "SMK40UU 40mm Slide Bush Bushings Motion Linear Bearings 20027" is in sale since Friday, December 13, 2013. This item is in the category "Business & Industrial\Automation, Motors & Drives\Mechanical Power Transmission\Bearings & Bushings\Other Bearings & Bushings". The seller is "irvineman" and is located in Anaheim, California. This item can be shipped worldwide.