Counterbored Holes Dimensions (inch) 

USA SOCKET-HEAD CAP SCREWS

Screw dia.

Counterbore dia.

Counterbore depth

Countersink dia.

Clearance dia. (normal fit)

Clearance dia. (close fit)

#0

1/8

.060

.074

#49

#51

#2

3/16

.086

.102

#36

3/32

#4

7/32

.112

.130

#29

1/8

#5

1/4

.125

.145

#23

9/64

#6

9/32

.138

.158

#18

#23

#8

5/16

.164

.188

#10

#15

#10

3/8

.190

.218

#2

#5

1/4

7/16

.250

.278

9/32

17/64

5/16

17/32

.312

.346

11/32

21/64

3/8

5/8

.375

.415

13/32

25/64

7/16

23/32

.438

.483

15/32

29/64

1/2

13/16

.500

.552

17/32

33/64

5/8

1

.625

.689

21/32

41/64

3/4

1 3/16

.750

.828

25/32

49/64

7/8

1 3/8

.875

.963

29/32

57/64

1

1 5/8

1.000

1.100

1 1/32

1 1/64

1 1/4

2

1.250

1.370

1 5/16

1 9/32

1 1/2

2 3/8

1.500

1.640

1 9/16

1 17/32

1 3/4

2 3/4

1.750

1.910

1 13/16

1 25/32

2

3 1/8

2.000

2.180

2 1/16

2 1/32

(close window)