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Part Number Designation pf51-pf522 pf51-pf521 pf51-pf52 Knob: Aluminum Ferrule: Aluminum Screw: 300 Series Stainless Steel Spring: 300 Series Stainless Steel All dimensions are in millimeters (Size Unit: mm)

Thread Size

Type

Thread Code

Shank Code

L
Nom.

Sheet Thickness
A
Min-Max

C
±0.06

E
±0.25

G
±0.4

T1
±0.2

T2
Nom.

B
Nin.

D
+0.08

N
±0.25

M
Nin.

Driver Size

Unified

Metric

Unified

Metric

.112-40(#4-40)

M3X0.5

PF51
PF16

440

M3

0

3.4

0-1.6

4.9

10.5

5.1

13.8

11.9

2.8

6.4

7.8

9.4

#1

1

6.6

15.3

2

8.2

16.9

.112-40(#4-40)

M3X0.5

PF52
PF26

440

M3

0

4.2

1.6-2.5

4.9

10.5

6.6

15.3

11.9

3.6

6.4

7.8

9.4

#1

1

8.2

16.9

.138-32(#6-32)

M3.5X0.6

PF51
PF16

632

M3.5

0

3.7

0-1.6

5.7

11.5

7.2

17.8

15.4

2.9

7.2

8.6

10.3

#2

1

8.8

19.4

2

10.4

21

.138-32(#6-32)

M3.5X0.6

PF52
PF26

632

M3.5

0

4.5

1.6-2.5

5.7

11.5

8.8

19.4

15.4

3.7

7.2

8.6

10.3

#2

1

10.4

21

.164-32(#8-32)

M4X0.7

PF51
PF16

832

M4

0

4

0-1.6

7.3

13

7.3

18.5

16.2

3.1

8.8

10.2

12

#2

1

8.8

20

2

10.4

21.8

.164-32(#8-32)

M4X0.7

PF52
PF26

832

M4

0

4.8

1.6-2.5

7.3

13

8.8

20

16.2

3.9

8.8

10.2

12

#2

1

10.4

21.6

.190-32(#10-32)

M5X0.8

PF51
PF16

032

M5

0

4

0-1.6

7.3

13

7.3

18.5

16.2

3.1

8.8

10.2

12

#2

1

8.8

20

2

10.4

21.8

.190-32(#10-32)

M5X0.8

PF52
PF26

032

M5

0

4.8

1.6-2.5

7.3

13

8.8

20

16.2

3.9

8.8

10.2

12

#2

1

10.4

21.6

.250-20(1/4-20)

M6X1

PF51
PF16

0420

M6

0

4

0-1.6

8.9

14.7

8.8

22.1

20

3.3

10.5

11.9

13.5

#3

1

10.4

23.7

2

12

25.3

.250-20(1/4-20)

M6X1

PF52
PF26

0420

M6

0

4.8

1.6-2.5

8.9

14.7

10.4

23.7

20

4.1

10.5

11.9

13.5

#3

1

12

25.3

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