Overview Reviews Product Description IKO® seals for Needle Roller Bearings have a low sectional height and consist of a sheet metal ring and special synthetic rubber. IKO Catalog Product Videos Custom Field Inner diameter 37mm Outer diameter 47mm Width 4mm Series Metric Product Reviews Write a Review Write a Review × IKO 37 x 47 x 4mm Metric Needle Roller Bearing Seal OS 37474 Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Review Subject * Comments *