Threaded Drill Bit #11, Cobalt, 1 1/4"

A #11 cobalt bit on the 1/4"-28 threaded shank angle drills take. #11 is the hole our drill chart gives for a 3/16" rivet.

Where to buy

AmericaDistributor coming soonOur partner for this region is on its way

EuropeDistributor coming soonOur partner for this region is on its way

OceaniaDistributor coming soonOur partner for this region is on its way

AmericaMore distributors coming soon

EuropeMore distributors coming soon

OceaniaMore distributors coming soon

A distributor's decimal for this size, 0.1910", is the one on our drill chart, where #11 is the drill for a 3/16" rivet.

The 1/4"-28 thread fits the Sioux 90° drill listed here.

Source: a distributor's listing, checked 2026-09-29.

What is the #11 x 1 1/4" Cobalt 1/4" x 28 Threaded Shank Bit made of?

NAS 965 cobalt steel, according to the distributor listing checked on 2026-09-29.

What shank does the #11 x 1 1/4" Cobalt 1/4" x 28 Threaded Shank Bit take?

1/4"-28 threaded, according to the distributor listing checked on 2026-09-29.

Where can I buy the #11 x 1 1/4" Cobalt 1/4" x 28 Threaded Shank Bit?

A distributor we checked lists it in the Americas. The link to its page, with the live price and stock, opens when the partnership does.

#11 x 1 1/4" Cobalt 1/4" x 28 Threaded Shank BitWhere to buy