34820 – 5/16″ x 3/4″ 3-Flute Flat Bottom Counterbore with TiN coated twist drill
$31.18
$46.45
Use SD-3 Counterbores to drill a pilot hole and counterbore a flat bottomed hole in one step. Perfect for lag screws, lag bolts, washer head screws, T-nuts & more.Drive Shank: 1/4″ Hex Power Bit ShankDrill Size: 5/16″ ØCounterbore Size: 3/4″ ØReplacement Twist Drill: Part # 39120Stop Collar: Part # 33164
Countersinks & Counterbores