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Silver cobalt drill bit, 12 inches long, 9/32 inch diameter, extended flute

Drill America

Drill America 9/32in x 12in Cobalt Aircraft Extension Drill Bit pneumatic accessory

SKU CH-2WKH-ADKHW

9/32-inch cobalt aircraft extension drill bit with 12-inch overall length and split point for heavy-duty drilling

  • Product typeDrill Accessories
  • Extended reach with 12 inch overall length
  • Cobalt steel resists heat in tough materials
  • Heavy-duty split point starts holes without wandering
  • 9/32 inch size suits specific drilling tasks

9/32 inch Cobalt Aircraft Extension Bit

This 12 inch cobalt steel drill bit is built for deep-hole drilling in tough metals. The heavy-duty split point reduces walking and starts cleanly on contact. It suits maintenance technicians and fabricators who need extended reach in aircraft or structural work. The 9/32 inch diameter matches specific fastener and rivet clearance requirements.

Check shank compatibility before ordering

Verify that your drill chuck or collet accepts a 9/32 inch shank diameter. Confirm the 12 inch overall length clears your workpiece and fixture without interference. Ensure your pneumatic or electric drill delivers adequate torque for cobalt steel in the target material. The flute length of 2-15/16 inches limits the maximum effective drilling depth per plunge.

How it compares

Measured against everything we stock in Bits, Hole Saws & Accessory Kits, at today’s prices. Recalculated every night.

Price $11.99
Cheaper than about 84% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameDrill America
Product typeDrill Accessories

Questions about this item

What comes in the box with the 9/32in x 12in Cobalt Aircraft Extension Drill Bit?

The box contains the single cobalt steel drill bit with a heavy-duty split point, 12-inch overall length, and 2-15/16-inch flute length.

Which size should I choose for a 9/32 inch hole requirement?

Select the 9/32 inch size; its decimal equivalent is .2812, matching the exact diameter needed for that hole specification.

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