4″ 1 1/2-8 THREADED 3 JAW CHUCK BACKPLATE (3900-3212)

4″ 1 1/2-8 THREADED 3 JAW CHUCK BACKPLATE (3900-3212) (SKU: 3900-3212)

4″ 1-1/2″

• 8 Threaded 3-Jaw Backplate
• Fits most plain back chucks
• Must be machined for concentricity
• Made of high grade casting steel
• Assembly instructions included
• Bolt circle is 3.3″
• Number of bolt holes is 3

Specifications

• 4″ 1-1/2″~8 Threaded 3-Jaw Backplate
• Fits most plain back chucks.
• Must be machined for concentricity.
• Made of high grade casting steel.
• Assembly instructions included.
• Bolt circle is 3.3″.
• Number of bolt holes is 3.
• Weight: 2.6
• Dimensions: L 3, W 1, H 6

Benefits

• Industrial-grade tooling designed for dependable shop performance.
• Supports consistent results when applied with correct setup practices.
• A practical choice for U.S. machine shops and maintenance work.

Recommended use

• Confirm compatibility (size, interface, machine capacity) before ordering.
• Follow safe operating practices and use appropriate PPE.
• Optimize setup rigidity and process parameters for best results.

USA Warehouse Stock — Fast U.S. fulfillment.