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Standard Burr-Bit diagram

Standard Burr-Bit diagram

Standard Burr-Bit diagram

Fractional and Machine Screw
Burr-Bit for two and four flute taps

Tap Size

UNC/UNF

A

(in)

B

(in)

C

(in)

D

(in)

Part #

120º

Part #

90º

#2-2FL

.17

.85

.56

.375

020200

120200

#3-2FL

.17

.85

.56

.375

020300

120300

#4-2FL

.17

.85

.56

.375

020400

120400

#5-2FL

.17

.87

.56

.375

020500

120500

#6-2FL

.17

.87

.56

.375

020600

120600

#8-2FL

.17

.87

.62

.375

020700

120700

#10-2FL

.17

1.06

.62

.375

020800

120800

#12-2FL

.17

1.06

.62

.375

020900

120900

1/4-2FL

.17

1.14

.75

.500

021100

121100

5/16-2FL

.17

1.25

.85

.562

021200

121200

3/8-2FL

.17

1.37

.87

.656

021300

121300

7/16-2FL

.17

1.75

.87

.812

021400

121400

1/2-2FL

.17

1.80

1.0

.812

021500

121500

9/16-2FL

.22

1.89

1.12

1.0

021600

121600

5/8-2FL

.22

1.89

1.12

1.0

021700

121700

11/16-2FL

.22

1.89

1.12

1.0

021800

121800

3/4-2FL

.22

1.93

1.18

1.12

021900

121900

7/8-4FL

.22

2.19

1.30

1.50

022100

1-4FL

.22

2.37

1.35

1.50

022300

Fractional and Machine Screw
Burr-Bit for three flute taps

Tap Size

UNC/UNF

A

(in)

B

(in)

C

(in)

D

(in)

Part #

120º

Part #

90º

#2-3FL

.17

.85

.56

.375

020250

120250

#3-3FL

.17

.85

.56

.375

020350

120350

#4-3FL

.17

.85

.56

.375

020450

120450

#5-3FL

.17

.87

.56

.375

020550

120550

#6-3FL

.17

.87

.56

.375

020650

120650

#8-3FL

.17

.87

.62

.375

020750

120750

#10-3FL

.17

1.06

.62

.375

020850

120850

#12-3FL

.17

1.06

.62

.375

020950

120950

1/4-3FL

.17

1.14

.75

.500

021150

121150

5/16-3FL

.17

1.25

.85

.562

021250

121250

3/8-3FL

.17

1.37

.87

.656

021350

121350

7/16-3FL

.17

1.75

.87

.812

021450

121450

1/2-3FL

.17

1.80

1.0

.812

021550

121550

9/16-3FL

.22

1.89

1.12

1.0

021650

121650

5/8-3FL

.22

1.89

1.12

1.0

021750

121750

11/16-3FL

.22

1.89

1.12

1.0

021850

121850

3/4-3FL

.22

1.93

1.18

1.12

021950

121950

Metric

Burr-Bit for two & four flute taps

Tap Size

A

(mm)

B

(mm)

C

(mm)

D

(mm)

Part #

120º

Part #

90º

M3-2FL

4.3

22.0

14.2

9.5

030300

130300

M4-2FL

4.3

22.0

15.7

9.5

030400

130400

M5-2FL

4.3

26.9

15.7

9.5

030500

130500

M6-2FL

4.3

26.9

19.0

12.7

030600

130600

M8-2FL

4.3

31.7

21.5

14.2

030800

130800

M10-2FL

4.3

34.7

22.0

16.6

031000

131000

M12-2FL

4.3

45.6

25.3

20.6

031200

131200

M14-2FL

4.3

47.9

28.5

25.3

031400

131400

M16-2FL

5.6

47.9

28.5

25.3

031600

131600

M18-2FL

5.6

48.9

29.9

28.5

031800

131800

M20-2FL

5.6

48.9

29.9

25.5

032000

132000

M22-4FL

5.6

58.3

33.0

38.0

032200

M24-4FL

5.6

59.6

34.2

38.0

032400

Metric

Burr-Bit for three flute taps

Tap Size

A

(mm)

B

(mm)

C

(mm)

D

(mm)

Part #

120º

Part #

90º

M3-3FL

4.3

22.0

14.2

9.5

030350

130350

M4-3FL

4.3

22.0

15.7

9.5

030450

130450

M5-3FL

4.3

26.9

15.7

9.5

030550

130550

M6-3FL

4.3

26.9

19.0

12.7

030650

130650

M8-3FL

4.3

31.7

21.5

14.2

030850

130850

M10-3FL

4.3

34.7

22.0

16.6

031050

131050

M12-3FL

4.3

45.6

25.3

20.6

031250

131250

M14-3FL

4.3

47.9

28.5

25.3

031450

131450

M16-3FL

5.6

47.9

28.5

25.3

031650

131650

M18-3FL

5.6

48.9

29.9

28.5

031850

131850