37012 QC-T 1/4"-20 Thread Flap Wheel – Bore Polisher Adapter

The Pro-Graad 37012 QC-T is a precision-machined 1/4"-20 Female x Female threaded adapter engineered to connect 1/4"-20 threaded flap wheels, bore polishers, mounted points, and rotary finishing accessories to a standard 1/4" shank extension mandrel. Built for metalworkers, fabricators, machinists, and woodworkers who demand reliable, repeatable performance from their tooling setups. Important: This adapter is female-threaded on both ends. A 1/4" shank x 1/4-20 male threaded extension mandrel is required (not included) to mount this adapter in your die grinder, drill, or rotary tool. Once paired with the correct mandrel, this adapter delivers a solid, low-runout connection to any 1/4"-20 threaded accessory. Pro-Graad machines this adapter to tight thread tolerances — no wobble, no slop, no vibration-induced runout that telegraphs into your finish or your bore. Whether you're polishing cylinder bores, deburring internal diameters, blending weld seams, or finishing tight cavities with a flap wheel, the 37012 holds your accessory true at speed. Standard 1/4"-20 threading means broad compatibility across the abrasives and finishing accessories you already stock — no proprietary systems, no locked ecosystems, no hunting for manufacturer-specific mandrels. Applications: Bore polishing, ID finishing, deburring, surface prep, woodworking, metalworking, fabrication, MRO. Specs: 1/4"-20 Female x 1/4"-20 Female | Pack of 1 | UPC: 810195112224

• [IN THE BOX]: 1 each Pro-Graad 37012 QC-T 1/4"-20 Female Threaded Flap Wheel & Bore Polisher Adapter
• [UNIVERSAL 1/4"-20 THREAD COMPATIBILITY]: Dual Female 1/4-20 threaded design connects flap wheels, mounted points, and rotary accessories to standard 1/4"-20 threaded extension mandrels (not included) — no proprietary fittings, no adapters you'll never find again
• [REQUIRES 1/4" SHANK x 1/4-20 MALE THREADED EXTENSION MANDREL (NOT INCLUDED)]: This adapter is Female x Female — a 1/4" shank / 1/4-20 male threaded extension mandrel (not included) is required to mount this in your tool; which then pairs with any standard die grinder, drill, or rotary tool via that mandrel
• [PRO-GRAAD PRECISION MACHINED]: Tight thread tolerances mean no wobble, no slop, no runout that kills your finish — built to the same standard as the abrasives it's designed to run
• [BROAD APPLICATION ACROSS METAL, WOOD, AND SURFACE PREP]: Once mounted on the correct mandrel, runs 1/4"-20 threaded flap wheels, mounted points, and 1/4-20 threaded finishing accessories across metalworking, fabrication, woodworking, and deburring applications