Industrial Quality Aircraft Drill Bits

High Speed Drill Bits

6” Length

SERIES 471

Part Number

Drill Size

Decimal Equivalence

Flute Length

4710604

1/16"

.0625

7/8"

4710608

1/8"

.1250

1-5/8"

4710609

9/64"

.1406

1-3/4"

4710610

5/32"

.1562

2"

4710611

11/64"

.1719

2-1/8"

4710612

3/16"

.1875

2-5/16"

4710613

13/64"

.2031

2-7/16"

4710614

7/32"

.2188

2-1/2"

4710615

15/64"

.2344

2-5/8"

4710616

1/4"

.2500

2-3/4"

4710617

17/64"

.2656

2-7/8"

4710618

9/32"

.2812

2-15/16"

4710619

19/64"

.2969

3-1/16"

4710620

5/16"

.3125

3-3/16"

4710621

21/64"

.3281

3-5/16"

4710622

11/32"

.3438

3-7/16"

4710623

23/64"

.3594

3-1/2"

4710624

3/8"

.3750

3-5/8"

4710625

25/64"

.3906

3-3/4"

4710626

13/32"

.4062

3-7/8"

4710627

27/64"

.4219

3-15/16"

4710628

7/16"

.4375

4-1/16"

4710629

29/64"

.4531

4-3/32"

4710630

15/32"

.4688

4-5/16"

4710631

31/64"

.4844

4-3/8"

4710632

1/2"

.5000

4-1/2"

12” Length

SERIES 472

Part Number

Drill Size

Decimal Equivalence

Flute Length

4721208

1/8"

.1250

1-5/8"

4721210

5/32"

.1562

2"

4721212

3/16"

.1875

2-5/16"

4721214

7/32"

.2188

2-1/2"

4721216

1/4"

.2500

2-3/4"

4721218

9/32"

.2812

2-15/16"

4721220

5/16"

.3125

3-3/16"

4721222

11/32"

.3438

3-7/16"

4721224

3/8"

.3750

3-5/8"

4721226

13/32"

.4062

3-7/8"

4721228

7/16"

.4375

4-1/16"

4721230

15/32"

.4688

4-5/16"

4721232

1/2"

.5000

4-1/2"

18” Length

SERIES 473

Part Number

Drill Size

Decimal Equivalence

Flute Length

4731812

3/16"

.1875

2-5/16"

4731816

1/4"

.2500

2-3/4"

4731820

5/16"

.3125

3-3/16"

4731824

3/8"

.3750

3-5/8"

4731828

7/16"

.4375

4-1/16"

4731832

1/2"

.5000

4-1/2"