The R1-3.7/16 is a split taper bushing for use with QD, TL or taper-lock sheaves, sprockets and pulleys. Provides a positive grip on the shaft with quick installation and removal for OEM and MRO maintenance. Specifications: - Manufacturer Part Number: R1-3.7/16 - Product Type: Split Taper Bushing - Series: R1 Series - Material: Ductile Iron - Bushing Size: R1 - Bushing Type: Double Split Tapered Type - Bushing Flange Width: 0.625 in - Bore Diameter: 0.787 in - Bore Type: Finished Bore with a Keyway - Outer Diameter: 5.375 in - Overall Width: 5.375 in - Overall Length: 5.375 in - Overall Height: 2.875 in - Length Through Bore: 2.875 in - Hub Diameter: 4 in - Hub Length: 2.25 in - Keyway Size: 7/8 x 7/16 - Keyway Type: Standard - Cap Screw Size: 3/8-16 X 1 3/4 - Cap Screw Quantity: 3 - Bolt Circle Diameter: 2.437 in - Finish/Coating: Black Phosphate - Part Weight: 4 lb Stocked and shipped fast from offroadbelts.com. Industrial-grade replacement part for OEM, MRO and maintenance buyers — order with confidence.