BT - STUB ARBOR HOLDER Taper SizeBT-40 and 50 A ➚ A .00020 AT3 Taper 58-60 HRc Ra 4µin 3.546 1.500 L1 1/2 D1 D G L W Designation D1 L1 L D W G BT40 STUB 1X3.546 1.000 2.480 6.260 1.500 .250 M16 BT40 STUB 1-1/4X3.546 1.250 2.480 6.378 1.772 .312 M16 BT50 STUB 1X3.546 1.000 2.055 6.268 1.500 .250 M24 BT50 STUB 1-1/4X3.546 1.250 2.055 6.386 1.772 .312 M24 810