The E1 is a qd (quick disconnect) 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: E1 - Product Type: QD (Quick Disconnect) Bushing - Series: E Series - Material: Ductile Iron - Bushing Size: E - Bushing Type: QD Type - Bushing Flange Width: 0.875 in - Bore Diameter: 1 in - Bore Type: Finished Bore with Keyway and 1 Set Screw - Outer Diameter: 6 in - Overall Width: 2.75 in - Overall Length: 6 in - Overall Height: 6 in - Length Through Bore: 2.75 in - Hub Diameter: 3.834 in - Hub Length: 1.875 in - Keyway Size: 1/4 X 1/8 - Keyway Type: Standard - Set Screw Size: 3/8/2016 - Cap Screw Size: 1/2-13 X 2 3/4 - Cap Screw Quantity: 3 - Cap Screw Grade: 5 - Bolt Circle Diameter: 2.6875 in - Finish/Coating: Black Phosphate - Part Weight: 11 lb Stocked and shipped fast from offroadbelts.com. Industrial-grade replacement part for OEM, MRO and maintenance buyers — order with confidence.