VEVOR 4-Jaw Lathe Chuck, 3 Inch (80 mm), 4-Jaw Independent Chuck, 0.1-3.15 in (5-80 mm) Clamping Range with T-key Fixing Screws Reversible Jaws, HT300 Material, Internal External for Wood Metal Lathe

No, this specific lathe chuck will not fit a 3/4"-16 TPI spindle directly; it is designed with a back-mounting interface rather than a threaded hub. If this response does not resolve your issue, please contact us again for assistance.