
| d1 Øh | d1 Øh | d1 decimal | l2 | l1 | R520 |
| 7 Inch | 7 mm | Inch | mm | mm | |
| 6.60 | 0.2598 | 31 | 70 | R5206.6 | |
| 6.70 | 0.2638 | 31 | 70 | R5206.7 | |
| 6.80 | 0.2677 | 34 | 74 | R5206.8 | |
| 6.90 | 0.2717 | 34 | 74 | R5206.9 | |
| 7.00 | 0.2756 | 34 | 74 | R5207.0 | |
| 7.10 | 0.2795 | 34 | 74 | R5207.1 | |
| 7.20 | 0.2835 | 34 | 74 | R5207.2 | |
| 7.30 | 0.2874 | 34 | 74 | R5207.3 | |
| 7.40 | 0.2913 | 34 | 74 | R5207.4 | |
| 7.50 | 0.2953 | 34 | 74 | R5207.5 | |
| 7.60 | 0.2992 | 37 | 79 | R5207.6 | |
| 7.70 | 0.3031 | 37 | 79 | R5207.7 | |
| 7.80 | 0.3071 | 37 | 79 | R5207.8 | |
| 7.90 | 0.3110 | 37 | 79 | R5207.9 | |
| 5/16 | 7.94 | 0.3126 | 37 | 79 | R5205/16 |
| 8.00 | 0.3150 | 37 | 79 | R5208.0 | |
| 8.10 | 0.3189 | 37 | 79 | R5208.1 | |
| 8.20 | 0.3228 | 37 | 79 | R5208.2 | |
| 8.30 | 0.3268 | 37 | 79 | R5208.3 | |
| 8.40 | 0.3307 | 37 | 79 | R5208.4 | |
| 8.50 | 0.3346 | 37 | 79 | R5208.5 | |
| 8.60 | 0.3386 | 40 | 84 | R5208.6 | |
| 8.70 | 0.3425 | 40 | 84 | R5208.7 | |
| 8.80 | 0.3465 | 40 | 84 | R5208.8 | |
| 8.90 | 0.3504 | 40 | 84 | R5208.9 | |
| 9.00 | 0.3543 | 40 | 84 | R5209.0 | |
| 9.10 | 0.3583 | 40 | 84 | R5209.1 | |
| 9.20 | 0.3622 | 40 | 84 | R5209.2 | |
| 9.30 | 0.3661 | 40 | 84 | R5209.3 | |
| 9.40 | 0.3701 | 40 | 84 | R5209.4 | |
| 9.50 | 0.3740 | 40 | 84 | R5209.5 | |
| 3/8 | 9.52 | 0.3748 | 43 | 89 | R5203/8 |
| 9.60 | 0.3780 | 43 | 89 | R5209.6 | |
| 9.70 | 0.3819 | 43 | 89 | R5209.7 | |
| 9.80 | 0.3858 | 43 | 89 | R5209.8 | |
| 9.90 | 0.3898 | 43 | 89 | R5209.9 | |
| 10.00 | 0.3937 | 43 | 89 | R52010.0 | |
| 10.10 | 0.3976 | 43 | 89 | R52010.1 | |
| 10.20 | 0.4016 | 43 | 89 | R52010.2 | |
| 10.30 | 0.4055 | 43 | 89 | R52010.3 | |
| 10.40 | 0.4094 | 43 | 89 | R52010.4 | |
| 10.50 | 0.4134 | 43 | 89 | R52010.5 | |
| 11.00 | 0.4331 | 47 | 95 | R52011.0 | |
| 7/16 | 11.11 | 0.4374 | 47 | 95 | R5207/16 |
| 11.20 | 0.4409 | 47 | 95 | R52011.2 | |
| 11.50 | 0.4528 | 47 | 95 | R52011.5 | |
| 12.00 | 0.4724 | 51 | 102 | R52012.0 | |
| 12.50 | 0.4921 | 51 | 102 | R52012.5 | |
| 1/2 | 12.70 | 0.5000 | 51 | 102 | R5201/2 |
| 13.00 | 0.5118 | 51 | 102 | R52013.0 | |
| 13.50 | 0.5315 | 54 | 107 | R52013.5 | |
| 14.00 | 0.5512 | 54 | 107 | R52014.0 | |
| 14.20 | 0.5591 | 56 | 111 | R52014.2 | |
| 14.25 | 0.5610 | 56 | 111 | R52014.25 | |
| 14.50 | 0.5709 | 56 | 111 | R52014.5 | |
| 15.00 | 0.5906 | 56 | 111 | R52015.0 | |
| 15.10 | 0.5945 | 58 | 115 | R52015.1 | |
| 5/8 | 15.88 | 0.6252 | 58 | 115 | R5205/8 |
| 16.00 16.50 | 0.6299 0.6496 | 58 60 | 115 119 | R52016.0 R52016.5 |