TB Wood's 10S238 Sleeve Coupling Flange, 10 Coupling Size, 3, 600 RPM Max Speed, 7 1 2 in Outside Dia, Inch 6894287 078 lb cu in Water Absorption 078 lb cu in Water Absorption Rating Excellent Impact Strength Rating Good Grade Standard Plastic Clarity Opaque Plastic Thickness Tolerance +0 48 89 9204 (3 16 in to 7 8 in x 1 16 in) 72 in Length through Bore 2 23 32 in Screw Thread Size 3 8" 16 Hub Diameter 4 3 8 in Keyway Width 5 8 in Hub Body Length 13 16 in Coupling Size 10 Keyway Depth 5 16 in Outside Diameter 7 1 2 in Bore Diameter 2 3 8 in Item Sleeve Coupling Flanges Sleeve Coupling Flange Flange Type Sleeve Couplings S Bore Type Couplings Fixed Bore Ideal For Applications In Motors 600 RPM Bushing Required None Body Style Type S Flange Close Coupled Setscrew Location One Over the Key and One at 90 Degrees Max