ISO-I ( Eye Joint )
| 内径 | NA | NC | ND | NE | NF | NG | NH | NJ | NK | NL | NM | NN | NP | NQ | PA | PB |
| 20 | 16 | 8 | 30 | 40 | 11 | 15 | M8x1.25 | 10 | 16 | 14 | 8 | 8 | 15 | 40 | 21 | 16.5 |
| 25 | 19 | 10 | 40 | 52 | 15 | 20 | M10x1.25 | 12 | 20 | 18 | 10 | 10 | 20 | 52 | 25 | 19.5 |
| 32 | 19 | 10 | 40 | 52 | 15 | 20 | M10x1.25 | 12 | 20 | 18 | 10 | 10 | 20 | 52 | 25 | 19.5 |
| 40 | 25.4 | 10 | 45 | 57 | 15 | 25 | M12x1.25 | 15 | 24 | 23 | 14 | 10 | 20 | 57 | 31 | 26 |
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