Socket Head Cap Screw Wrench Sizes
Number Cap Screws
| Screw Size | Decimal Equiv. |
Hex Key | Screw Head | Counterbore | Countersink Diam, in, 60° (C) |
Clearance Drills (D) | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Diam, in | Height, in | Diam, in (A) | Depth, in (B) | Norm. Fit | Close Fit | |||||||
| No. 0 | 0.060 | 0.050 | 0.096 | 0.060 | 1/8 | 0.060 | 0.074 | #49 | #51 | |||
| No. 1 | 0.073 | 1/16 | 0.118 | 0.073 | 5/32 | 0.073 | 0.087 | #43 | #46 | |||
| No. 2 | 0.086 | 5/64 | 0.140 | 0.086 | 3/16 | 0.086 | 0.102 | #36 | 3/32" | |||
| No. 3 | 0.099 | 5/64 | 0.161 | 0.099 | 7/32 | 0.099 | 0.115 | #31 | #36 | |||
| No. 4 | 0.112 | 3/32 | 0.183 | 0.112 | 7/32 | 0.112 | 0.130 | #29 | 1/8" | |||
| No. 5 | 0.125 | 3/32 | 0.205 | 0.125 | 1/4 | 0.125 | 0.145 | #23 | 9/64" | |||
| No. 6 | 0.138 | 7/64 | 0.226 | 0.138 | 9/32 | 0.138 | 0.158 | #18 | #23 | |||
| No. 8 | 0.164 | 9/64 | 0.270 | 0.164 | 5/16 | 0.164 | 0.188 | #10 | #15 | |||
| No. 10 | 0.190 | 5/32 | 0.312 | 0.190 | 3/8 | 0.190 | 0.218 | #2 | #5 | |||
| No. 12 | 0.216 | 5/32 | 0.345 | 0.216 | 13/32 | 0.216 | 1/4" | 15/64" | ||||
Fractional Cap Screws
| Screw Size | Decimal Equiv. |
Hex Key | Screw Head | Counterbore | Countersink Diam, in, 60° (C) |
Clearance Drills (D) | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Diam, in | Height, in | Diam, in (A) | Depth, in (B) | Norm. Fit | Close Fit | |||||||
| 1/4" | 0.250 | 3/16 | 0.375 | 0.250 | 7/16 | 0.250 | 0.278 | 9/32" | 17/64" | |||
| 5/16" | 0.313 | 1/4 | 0.469 | 0.313 | 17/32 | 0.313 | 0.346 | 11/32" | 21/64" | |||
| 3/8" | 0.375 | 5/16 | 0.563 | 0.375 | 5/8 | 0.375 | 0.415 | 13/32" | 25/64" | |||
| 7/16" | 0.438 | 3/8 | 0.656 | 0.438 | 23/32 | 0.438 | 0.483 | 15/32" | 29/64" | |||
| 1/2" | 0.500 | 3/8 | 0.750 | 0.500 | 13/16 | 0.500 | 0.552 | 17/32" | 33/64" | |||
| 9/16" | 0.563 | 7/16 | 0.844 | 0.563 | 29/32 | 0.563 | 39/64" | 37/64" | ||||
| 5/8" | 0.625 | 1/2 | 0.938 | 0.625 | 1 | 0.625 | 0.689 | 21/32" | 41/64" | |||
| 3/4" | 0.750 | 5/8 | 1.125 | 0.750 | 1-3/16 | 0.750 | 0.828 | 25/32" | 49/64" | |||
| 7/8" | 0.875 | 3/4 | 1.313 | 0.875 | 1-3/8 | 0.875 | 0.963 | 29/32" | 57/64" | |||
| 1" | 1.000 | 3/4 | 1.500 | 1.000 | 1-5/8 | 1.000 | 1.100 | 1-1/32" | 1-1/64" | |||
| 1-1/8" | 1.125 | 7/8 | 1.688 | 1.125 | 1-13/16 | 1.125 | 1-11/64" | #26 | ||||
| 1-1/4" | 1.250 | 7/8 | 1.875 | 1.250 | 2 | 1.250 | 1.370 | 1-5/16" | 1-9/32" | |||
| 1-1/2" | 1.500 | 1 | 2.250 | 1.500 | 2-3/8 | 1.500 | 1.640 | 1-9/16" | 1-17/32" | |||
| 1-3/4" | 1.750 | 1-1/4 | 2.625 | 1.750 | 2-3/4 | 1.750 | 1.910 | 1-13/16" | 1-25/32" | |||
| 2" | 2.000 | 1-1/2 | 3.000 | 2.000 | 3-1/8 | 2.000 | 2.180 | 2-1/16" | 2-1/32" | |||
Metric Cap Screws
| Screw Size | Decimal Equiv. |
Hex Key | Screw Head | Counterbore | Countersink Diam, mm, 60° (C) |
Clearance Drills (D) | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Diam, mm | Height, mm | Diam, mm (A) | Depth, mm (B) | Norm. Fit | Close Fit | |||||||
| M1.6 | 0.062 | 1.5 | 3.0 | 1.6 | 3.50 | 1.6 | 2.0 | 1.95 | 1.80 | |||
| M2 | 0.078 | 1.5 | 3.8 | 2.0 | 4.40 | 2.0 | 2.6 | 2.40 | 2.20 | |||
| M2.5 | 0.098 | 2 | 4.5 | 2.5 | 5.40 | 2.5 | 3.1 | 3.00 | 2.70 | |||
| M2.6 | 0.102 | 2 | 5.0 | 2.6 | 6.00 | 2.6 | 3.20 | 3.00 | ||||
| M3 | 0.118 | 2.5 | 5.5 | 3.0 | 6.50 | 3.0 | 3.6 | 3.70 | 3.40 | |||
| M4 | 0.157 | 3 | 7.0 | 4.0 | 8.25 | 4.0 | 4.7 | 4.80 | 4.40 | |||
| M5 | 0.196 | 4 | 8.5 | 5.0 | 9.75 | 5.0 | 5.7 | 5.80 | 5.40 | |||
| M6 | 0.236 | 5 | 10.0 | 6.0 | 11.20 | 6.0 | 6.8 | 6.80 | 6.40 | |||
| M8 | 0.315 | 6 | 13.0 | 8.0 | 14.50 | 8.0 | 9.2 | 8.80 | 8.40 | |||
| M10 | 0.393 | 8 | 16.0 | 10.0 | 17.50 | 10.0 | 11.2 | 10.80 | 10.50 | |||
| M12 | 0.472 | 10 | 18.0 | 12.0 | 19.50 | 12.0 | 14.2 | 13.00 | 12.50 | |||
| M14 | 0.551 | 12 | 21.0 | 14.0 | 22.50 | 14.0 | 16.2 | 15.00 | 14.50 | |||
| M16 | 0.629 | 14 | 24.0 | 16.0 | 25.50 | 16.0 | 18.2 | 17.00 | 16.50 | |||
| M18 | 0.708 | 14 | 27.0 | 18.0 | 28.50 | 18.0 | 19.00 | 18.50 | ||||
| M20 | 0.787 | 17 | 30.0 | 20.0 | 31.50 | 20.0 | 22.4 | 21.00 | 20.50 | |||
| M24 | 0.944 | 19 | 36.0 | 24.0 | 37.50 | 24.0 | 26.4 | 25.00 | 24.50 | |||
| M30 | 1.181 | 22 | 45.0 | 30.0 | 47.50 | 30.0 | 33.4 | 31.50 | 31.00 | |||
| M36 | 1.417 | 27 | 54.0 | 36.0 | 56.50 | 36.0 | 39.4 | 37.50 | 37.00 | |||
| M42 | 1.653 | 63.0 | 42.0 | 66.00 | 42.0 | 45.6 | 44.00 | 43.00 | ||||
| M48 | 1.889 | 72.0 | 48.0 | 75.00 | 48.0 | 52.6 | 50.00 | 49.00 | ||||