Precise L-Mount 8-1/4" Chuck Size Semi-Machined Chuck Adapter (Back Plate) - 3900-4849

• Semi-finished back plate for universal chucks.
• Plain-back chucks require the adapter plate to be machined before mounting to ensure concentricity.
• Made of high grade casting steel.
• Thread T-UNS3: 3-3/4-6

For More Precise A, D & L Mount Semi-Machined Chuck Adapters (Back Plates) Click Here