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Sizes | API REG Pin | IADC code |
3 7/8”(98.4mm) | 2 3/8 | 126/216/637 |
4 5/8”(117.4mm) | 2 7/8 | 126/216/517/537/637 |
5 1/4”(133.3mm) | 3 1/2 | 126/216/517/537/637 |
5 5/8"(142.8mm) | 3 1/2 | 126/216/517/537/637 |
5 7/8"(149.2mm) | 3 1/2 | 126/216/517/537/637 |
6"(152.4mm) | 3 1/2 | 126/127/216/517/537/617/637 |
6 1/4"(158.7mm) | 3 1/2 | 126/127/216/517/537/617/637 |
6 1/2"(165mm) | 3 1/2 | 126/127/216/517/537/617/637 |
7 1/2"(190mm) | 4 1/2 | 126/216/517/537 |
7 5/8' (193mm) | 4 1/2 | 126/216/517/537 |
7 7/8"(200mm) | 4 1/2 | 126/216/517/537 |
8 1/2"(215.9mm) | 4 1/2 | 117/127/217/637/517/537/617/637 |
9 1/2"(241.3mm) | 6 5/8 | 117/127/217/637/517/537/617/637 |
9 7/8'(250.8mm) | 6 5/8 | 117/127/217/637/517/537/617/637 |
10 5/8'(269.8mm) | 6 5/8 | 117/127/217/637/517/537/617/637 |
11 5/8"(295.3mm) | 6 5/8 | 117/127/217/637/517/537/617/637 |
12 1/4"(311.1mm) | 6 5/8 | 117/127/217/637/517/537/617/637 |
13 5/8"(346.0mm) | 6 5/8 | 127/217/517/537/617/637 |
14 3/4"(374.6mm) | 7 5/8 | 127/217/517/537/617/637 |
17 1/2"(444.5mm) | 7 5/8 | 114/115/125/215/515/535/615/635 |
26"(660.4mm) | 7 5/8 | 114/115/125/215/515/535/615 |










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