| SIZE | THREADS PER INCH | PITCH | HELIX ANGLE | THREAD DEPTH | O.D. | P.D | M.D |
| 0000-160 | 160 | .00625" | 6° 43" | .00406" | .0210" | .0169" | .0128" |
| 000-120 | 120 | .00833" | 5° 18" | .00541" | .0340" | .0286" | .0232" |
| 00-90 | 90 | .01111" | 5° 5" | .00722" | .0470" | .0398" | .0326" |
| 0-80 | 80 | .01250" | 4° 23" | .00812" | .0600" | .0159" | .0438" |
| 1-72 | 72 | .01389" | 3° 57" | .00902" | .0730" | .0640" | .0550" |
| 2-56 | 56 | .01786" | 4° 22" | .01160" | .0860" | .0744" | .0628" |
 |
| NOTE: Minor dia. of nuts is omitted as it is determine by the thread percentage required |
| SIZE | THREAD PERCENTAGE AND TAP DRILL SIZE/ALTERNATE | ||||
| 50% | 55% | 60% | 65% | Clearance Drill | |
| 0000-160 | .42MM/--- | .41MM/#78 | .40MM/#78 | .39MM/1/64" | #73 |
| 000-120 | .72MM/#70 | .70MM/#70 | .69MM/#71 | .68MM/--- | #63 |
| 00-90 | 1.00MM/---- | .98MM/#61 | #62/--- | .95MM/#63 | 1.25MM |
| 0-80 | 1.31MM/---- | 1.29MM/---- | 1.27MM/---- | 1.25MM/---- | #52 |
| 1-72 | #52/---- | 1/16"/---- | 1.57MM/---- | 1.5MM/---- | #48 |
| 2-56 | 1.88MM/---- | #49MM/---- | 1.82MM/---- | 1.79MM/#50 | #43 |
| Tap Drill Hole Size Calculation (use smaller Num/Frac/Metric drill closest to result) | |||||
| Hole Size = Basic O.D. - (2x Thread Depth x Thread % Required) | |||||
