Square Serrated Key Jaws & Jaw Nuts

Square Serrated Key Jaws — Style B
Made with 6061 T-6 condition aluminum or 1018 steel
Add SQ suffix to part # for square nosed version

Dimensions in inches unless otherwise noted

A

B

C

D

E

F

G

H

CHUCK

ALUMINUM
PART#

STEEL 
PART#

WIDTH

HEIGHT

LENGTH

SLOT

SLOT

HOLE 
SPACING

BOLT 
SIZE

TAPPED 
HOLE

6

6A

6S

1 1/4

1 1/2

3

0.738

0.377

1.688

5/16

N/A

6A1

6S1

1 1/4

2

3

0.738

0.377

1.688

5/16

N/A

7.5

7.5A

7.5S

1 1/2

2

4

0.866

0.377

1.688

5/16

N/A

7.5A1

7.5S1

1 1/2

3

4

0.866

0.377

1.688

5/16

N/A

8

8A

8S

1 1/2

2

4

0.500

0.744

1.438

3/8

1/4-20

8A1

8S1

1 1/2

3

4

0.500

0.744

1.438

3/8

1/4-20

8LPA

8LPS

1 1/2

2

3 1/4

0.667

0.601

1.250

1/2

10-32

8LPA1

8LPS1

1 1/2

3

3 1/4

0.667

0.601

1.250

1/2

10-32

10-12

12A

12S

2

2

5 1/2

0.750

0.993

1.750

1/2

5/16-18

12A1

12S1

2

3

5 1/2

0.750

0.993

1.750

1/2

5/16-18

12A-5-8

12S-5-8

2

2

5 1/2

0.750

0.993

1.750

5/8

5/16-18

12A1-5-8

12S1-5-8

2

3

5 1/2

0.750

0.993

1.750

5/8

5/16-18

15

15A

15S

2 1/2

3

6 1/2

1.000

1.487

2.500

3/4

3/8-16

15A1

15S1

2 1/2

4

6 1/2

1.000

1.487

2.500

3/4

3/8-16

Square Serrated Key Pie Jaws^® — Style E
Made with 319 cast aluminum, cast iron, 1018 steel or A36 steel
Add CI prefix to aluminum part # for cast iron jaws
Add ST prefix to aluminum part # for steel jaws
Cast iron version weight is approximately 2.6 times that of aluminum
Steel version weight is approximately 2.8 times that of aluminum

Dimensions in inches unless otherwise noted • Weights in lbs.

A

B

D

E

F

G

H

J

CHUCK

ALUMINUM PART#

DIAMETER

HEIGHT

SLOT

SLOT

HOLE SPACING

BOLT SIZE

TAPPED HOLE

DIM

WEIGHT

6

6P

6

2

0.738

0.377

1.688

5/16

N/A

1 13/16

5.7

6P1

6

4

0.738

0.377

1.688

5/16

N/A

1 13/16

10.8

7.5

7.5P

8

2

0.866

0.377

1.688

5/16

N/A

1 13/16

10.2

8

8P

8

2

0.500

0.744

1.438

3/8

1/4-20

3

10.2

8P1

8

4

0.500

0.744

1.438

3/8

1/4-20

3

19.8

8LPP

8

2

0.667

0.601

1.250

1/2

10-32

3 3/16

10.2

8LPP1

8

4

0.667

0.601

1.250

1/2

10-32

3 3/16

19.8

10

10P

10

2

0.750

0.993

1.750

1/2

5/16-18

3 3/4

16.2

10P1

10

4

0.750

0.993

1.750

1/2

5/16-18

3 3/4

31.5

10P6

10

6

0.750

0.993

1.750

1/2

5/16-18

3 3/4

46.8

12-10P

12

2

0.750

0.993

1.750

1/2

5/16-18

3 3/4

23.4

15-10P

15

3

0.750

0.993

1.750

1/2

5/16-18

3 3/4

53.7

18-10P

18

3

0.750

0.993

1.750

1/2

5/16-18

3 3/4

77.7

10P-5-8

10

2

0.750

0.993

1.750

5/8

5/16-18

3 3/4

16.2

10P1-5-8

10

4

0.750

0.993

1.750

5/8

5/16-18

3 3/4

31.5

10P6-5-8

10

6

0.750

0.993

1.750

5/8

5/16-18

3 3/4

46.8

12-10P-5-8

12

2

0.750

0.993

1.750

5/8

5/16-18

3 3/4

23.4

15-10P-5-8

15

3

0.750

0.993

1.750

5/8

5/16-18

3 3/4

53.7

18-10P-5-8

18

3

0.750

0.993

1.750

5/8

5/16-18

3 3/4

77.7

12

12P

12

2

0.750

0.993

1.750

1/2

5/16-18

4 5/8

23.4

12P1

12

4

0.750

0.993

1.750

1/2

5/16-18

4 5/8

45.3

12P-5-8

12

2

0.750

0.993

1.750

5/8

5/16-18

4 5/8

23.4

12P1-5-8

12

4

0.750

0.993

1.750

5/8

5/16-18

4 5/8

45.3

15

15P

15

3

1.000

1.487

2.500

3/4

3/8-16

5 3/4

53.7

15P1

15

4

1.000

1.487

2.500

3/4

3/8-16

5 3/4

70.8

18

18P

18

3

1.000

1.487

2.500

3/4

3/8-16

7 1/8

77.7

18P1

18

4

1.000

1.487

2.500

3/4

3/8-16

7 1/8

102.6

Square Serrated Key Hard Jaws
Made with 1018 case hardened steel

Dimensions in inches unless otherwise noted

A

B

C

D

E

F

G

H

J

K

L

CHUCK

PART#

WIDTH

HEIGHT

LENGTH

SLOT

SLOT

HOLE SPACING

BOLT SIZE

TAPPED HOLE

DIM

STEP 1

STEP 2

10-12

10HJDS

1.75

2.50

3.78

0.750

0.993

1.750

1/2

5/16-18

2.159

.063

1.25

10HJDS-5-8

1.75

2.50

3.78

0.750

0.993

1.750

5/8

5/16-18

2.159

.063

1.25

15

15HJDS

2.25

3.00

4.75

1.000

1.487

2.500

3/4

3/8-16

3.013

.075

1.50

Jaw Nuts For Square Serrated Key Chucks
Made with 4140 steel

Dimensions in inches unless otherwise noted

A

B

C

D

E

F

G

M

CHUCK

PART#

WIDTH

HEIGHT

LENGTH

TONGUE

SLOT

HOLE SPACING

BOLT SIZE

FLANGE

10-12

12JN

1.00

1.00

2.50

0.750

0.996

1.750

1/2

0.381

12JN-5-8

1.00

1.00

2.50

0.750

0.996

1.750

5/8

0.440

15

15JN

1.25

1.25

3.75

1.000

1.489

2.500

3/4

0.430

Square Serrated Key Master Keys
Made with 1018 case hardened steel

Dimensions in inches unless otherwise noted

A

B

C

H

N

O

CHUCK

PART#

WIDTH

HEIGHT

LENGTH

BOLT SIZE

DEPTH

PITCH

10-12

12MK

0.993

0.50

1.69

5/16

0.13

0.25

15-18

15MK

1.487

0.50

2.25

3/8

0.13

0.25

21-24

21MK

1.487

0.50

2.50

3/8

0.13

0.25