Union Butterfield 4113-4 taper shank sleeve adapter. Part number 3210053. For adapting taper shank tooling to machine spindles.

Union Butterfield Taper Sleeve, Standard Length, Series: 411, #3 Inside Morse Taper, #4 Outside Morse Taper, 5-5/16 in Overall Length, HSS.

• Steam oxide surface finish prevents corrosion
• Black oxide treatment adds lubricity and creates small pockets on the surface of the tool that act to hold coolant near the cutting edge
• Morse taper shank allows the tool to be inserted directly into the machine's spindle to facilitate high torque applications such as large cut diameters
• Heat treated externally ground
• Standard reducing sleeve inside
• Hardened and ground throughout