Check the listing for details. Smith Tool 3717-SS Over Spindle Adapter. Condition: Used. Listed at 10.00 USD. Smith Tool 3717-SS Over Spindle Adapter Tooling for quick change drilling system INCH PART NUMBER A TOOL SIZE ACME (INCH) B SPINDLE +.000 -.002 C +.000 -.005 D MIN. STEP-UP +/-.010 E MAX. F TOTAL LENGTH G H +/-.005 MOUNTING SCREW SIZE REF. SMITH-LOCK CONVERSION NUT NO. 3712-SS 3/4-12 1.235 .500 .38 1.76 1.26 1.102 .320 5/16-24 3812 3717-SS 1-1/16-12 1.610 2.18 3817 3722-SS 1-3/8-12 1.985 2.56 3822 METRIC PART NUMBER A TOOL SIZE TRAP. (METRIC) B SPINDLE +.00 -.05 C +.00 -.13 D MIN. STEP-UP +/-.25 E MAX. F TOTAL LENGTH G H +/-.13 MOUNTING SCREW SIZE REF. SMITH-LOCK CONVERSION NUT NO. 3920-SS* TR20 31.37 12.70 9.65 44.20 32.0 28.0 8.13 M8 X 1.0mm 4020 3928-SS TR28 40.89 55.37 4028 3936-SS* TR36 50.42 65.02 4036 Listing and template services provided by inkFrog