6" L-MOUNT L-00 BACK PLATE FOR 3-JAW CHUCK - NO BOLT HOLES (3900-4847)

6" L-Mount (L-00) Back Plate for 3-Jaw Chuck Back plate is for universal plain back chucks. Plain-back chucks require the adapter plate to be machined before mounting to ensure concentricity. This back plate is approximately 1-1/4" thick. 3-3/4~6 thread (T-UNS3). Made of high grade casting steel. Shipping Weight: 10.7 lbs