Burr-Bit for Forming Taps
Fractional, Machine Screw and Metric

Part#

UNC/UNF

Tap

Size

Part #

(Metric)

Tap

Size

A

(in)

B

(in)

C

(in)

D

(in)

20410

#4

—

—

.17

.85

.56

.375

20510

#5

30310

M3

.17

.87

.56

.375

20610

#6

—

—

.17

.87

.56

.375

20710

#8

30320

M3.5

.17

.87

.62

.375

—

—

30410

M4

.17

.87

.62

.375

20810

#10

30510

M5

.17

1.06

.62

.375

20910

#12

—

—

.17

1.06

.62

.375

21110

1/4

30610

M6

.17

1.14

.75

.500

21210

5/16

30810

M8

.17

1.25

.85

.562

21310

3/8

31010

M10

.17

1.37

.87

.656

21410

7/16

—

—

.17

1.75

.87

.812

21510

1/2

31210

M12

.17

1.80

1.00

.812