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管螺紋環規，R規，管螺紋塞規
注：用螺紋密封的管螺紋環塞規
型號：GB/T 10031
型號：GB/T 10031
| 公稱直徑 | 螺距 | 錐度 | |
| Gage code | Tooth No. | Pitch | Taper |
| R1/16 | 28 | 0.907 | 1:16 |
| R1/8 | |||
| R1/4 | 19 | 1.337 | |
| R3/8 | |||
| R1/2 | 14 | 1.814 | |
| R3/4 | |||
| R1 | 11 | 2.309 | |
| R1 1/4 | |||
管螺紋環規，R規，管螺紋塞規
| 公稱直徑 | 螺距 | 錐度 | |
| Gage code | Tooth No. | Pitch | Taper |
| R1 1/2 | 11 | | 1:16 |
| R2 | |||
| R2 1/2 | |||
| R3 | |||
| R3 1/2 | | | |
| R4 | |||
| R5 | |||
| R6 | |||