SWK4UU:Made in Japan:NB Linear Systems Square Flange Type Nippon Bearing Linear Systems SWK4UU 1/4" Bore linear motion ball bushings/bearings, the inner diameter(bore) is 1/4" inch dimensions with steel retainer, bearing is a high accuracy grade linear bushings, series mainly used in the USA, NB brand (Nippon Bearing Linear Systems), made in Japan. Dimensions (inch) drDLDfKtP.C.D.XYZ 1/4"1/2"3/4"1-1/4"1"7/32"7/8"5/32"1/4"9/64"
