JavaScript seems to be disabled in your browser. For the best experience on our site, be sure to turn on Javascript in your browser.

Home
Products
Cutting Tools
Drill Bits
Aircraft Extension Bits

Aircraft Extension Bits

Diameter (Size A)	Decimal equivalent	Flute length (Size B)	Overall length (Size C)	As Low As	Domestic
1/8"	0.1250"	1-5/8"	6"	$2.39
3/16"	0.1875"	2-5/16"	6"	$2.67
3/16"	0.1875"	2-5/16"	12"	$6.40
1/4"	0.2500"	2-3/4"	6"	$3.99
1/4"	0.2500"	2-3/4"	12"	$7.20
5/16"	0.3125"	3-3/16"	6"	$6.78
5/16"	0.3125"	3-3/16"	12"	$9.60
3/8"	0.3750"	3-5/8"	6"	$10.37
3/8"	0.3750"	3-5/8"	12"	$11.49
7/16"	0.4375"	4-1/16"	6"	$13.05
7/16"	0.4375"	4-1/16"	12"	$12.78
1/2"	0.5000"	4-1/2"	6"	$15.96		Please call
1/2"	0.5000"	4-1/2"	12"	$17.60

1/8" x 6" Black Oxide Extension Drill Bit

Decimal equivalent: 0.1250"
Flute length (Size B): 1-5/8"
Overall length (Size C): 6"
As Low As: $2.39
Domestic:

>View More Info

3/16" X 6" Black Oxide Extension Drill Bit

Decimal equivalent: 0.1875"
Flute length (Size B): 2-5/16"
Overall length (Size C): 6"
As Low As: $2.67
Domestic:

>View More Info

3/16" x 12" Black Oxide Extension Drill Bit

Decimal equivalent: 0.1875"
Flute length (Size B): 2-5/16"
Overall length (Size C): 12"
As Low As: $6.40
Domestic:

>View More Info

1/4" x 6" Black Oxide Extension Drill Bit

Decimal equivalent: 0.2500"
Flute length (Size B): 2-3/4"
Overall length (Size C): 6"
As Low As: $3.99
Domestic:

>View More Info

1/4" x 12" Black Oxide Extension Drill Bit

Decimal equivalent: 0.2500"
Flute length (Size B): 2-3/4"
Overall length (Size C): 12"
As Low As: $7.20
Domestic:

>View More Info

5/16" x 6" Black Oxide Extension Drill Bit

Decimal equivalent: 0.3125"
Flute length (Size B): 3-3/16"
Overall length (Size C): 6"
As Low As: $6.78
Domestic:

>View More Info

5/16" X 12" Black Oxide Extension Drill Bit

Decimal equivalent: 0.3125"
Flute length (Size B): 3-3/16"
Overall length (Size C): 12"
As Low As: $9.60
Domestic:

>View More Info

3/8" X 6" Black Oxide Extension Drill Bit

Decimal equivalent: 0.3750"
Flute length (Size B): 3-5/8"
Overall length (Size C): 6"
As Low As: $10.37
Domestic:

>View More Info

3/8" X 12" Black Oxide Extension Drill Bit

Decimal equivalent: 0.3750"
Flute length (Size B): 3-5/8"
Overall length (Size C): 12"
As Low As: $11.49
Domestic:

>View More Info

7/16" X 6" Black Oxide Extension Drill Bit

Decimal equivalent: 0.4375"
Flute length (Size B): 4-1/16"
Overall length (Size C): 6"
As Low As: $13.05
Domestic:

>View More Info

7/16" X 12" Black Oxide Extension Drill Bit

Decimal equivalent: 0.4375"
Flute length (Size B): 4-1/16"
Overall length (Size C): 12"
As Low As: $12.78
Domestic:

>View More Info

1/2" X 6" Black Oxide Extension Drill Bit

Decimal equivalent: 0.5000"
Flute length (Size B): 4-1/2"
Overall length (Size C): 6"
As Low As: $15.96
Domestic:
Please call for availability

>View More Info

1/2" X 12" Black Oxide Extension Drill Bit

Decimal equivalent: 0.5000"
Flute length (Size B): 4-1/2"
Overall length (Size C): 12"
As Low As: $17.60
Domestic:

>View More Info