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About Counterbores
Create flat-bottomed holes, so your screw heads sit flush, recessed, or slightly raised.
Drill-Point Counterbores
Skip a step when installing screws in metal. With a sharp point on the tip, these counterbores drill a pilot hole topped with a flat recess for the screw head. That's faster and more accurate than switching to a counterbore in between passes with your drill bit.
High-Speed Steel
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Durable and wear resistant, these counterbores make accurate cuts in most materials without chipping or cracking.
Shank | Uncoated | |||||||||
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For Screw Size | Body Dia. | Overall Lg. | Dia. | Type | No. of Flutes | Max. Hole Drilling Dp. | Each | |||
No. 8 | 0.290" | 1 15/32" | 5/16" | Round | 2 | 0.281" | 00000000 | 000000 | ||
Hex-Bit Taps
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You only need one tool to turn these taps and install screws. The 1/4" hex shank fits hand or powered screwdrivers for threading holes. Then switch to a screwdriver bit to finish the job. To tap in hard-to-reach spots, add a bit extension. Taps have straight flutes that are good for most jobs.
High-Speed Steel—The most versatile taps resist heat and wear to stay sharp. They’re good for most metals and plastic.
Uncoated—The economical choice, these won't last as long as coated taps.
Plug Chamfer—Our go-to chamfer type, these thread both through holes and blind holes. The tapered section is shorter than a taper chamfer and longer than bottoming chamfer. As a result, they're easier to turn than bottoming taps but require more force than taper taps.
Drill Bit | Plug Chamfer | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Thread Size | Thread Lg. | Overall Lg. | Thread Type | No. of Flutes | Size, mm | Decimal Size Equiv. | Shank Type | Hex Shank Size | Each | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
High-Speed Steel | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Uncoated | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
M6 × 0.75 mm | 11/16" | 1 15/32" | Metric | 3 | 5.2 | 0.2047" | Hex | 1/4" | 0000000 | 000000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||