6303-2NSE9NR Nachi Bearing With Snap Ring (C clip) 17mm x 47mm x 14mm Made in Japan 6303-2NSE9NR Nachi Bearing with a Snap Ring, the 6303-2NSE9NR inner diameter is 17mm, the 6303-2NSE9NR outer diameter is 47mm, 6303-2NSE9NR width is 14mm.