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The 3M 7100242989 is a 769F 4-1/2 in Type 27 quick-change flap disc with 40+ grit, built for material removal and surface preparation. It uses 3M Precision-Shaped Grain blended with aluminum oxide on a YF-weight polyester backing and an open coat construction. The disc mounts with a 5/8-11 threaded arbor, runs to 13,300 RPM, and is intended for weld grinding, beveling, deburring, blending, and finishing on carbon and stainless steel.
4-1/2 in 769F flap disc, 40+ grit, 5/8-11 quick-change, precision-shaped grain
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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