6203ZZ Nachi Bearing, Made in Japan, here are the dimensions of the 6203ZZ, inner diameter is 17mm, the outer diameter is 40mm, 6203ZZ width is 12mm.

• Item: 6203ZZ Nachi Double Shielded Ball Bearings
• Dimensions: 17*40*12 mm/Metric
• ID (inner diameter)/Bore=17mm
• OD (outer diameter D1)=40mm
• Width/Height/thickness=12mm
• Radial Clearance: C3
• 6203ZZE Closures: Double shielded with Metal shields Z/ZZ/2Z
• 6203ZZE Type: Nachi Deep groove Ball Bearings
• Size: 17mm x 40mm x 12mm
• Made in Japan
• Quantity: One Bearing 6203ZZ