直接滚轧直螺纹套筒
| 钢筋直径 | 外径(mm) | 长度(mm) | ||
| 钢筋强度级别≤400 | 钢筋强度级别 500 | 钢筋强度级别≤400 | 钢筋强度级别 500 | |
| 12 | 18.5 | 19.5 | 28 | 32 |
| 14 | 21.5 | 23 | 32 | 36 |
| 16 | 24.5 | 26 | 36 | 40 |
| 18 | 27.5 | 29 | 41 | 46 |
| 20 | 30.5 | 32 | 45 | 50 |
| 22 | 33 | 35 | 49 | 54 |
| 25 | 37.5 | 50 | 56 | 62 |
| 28 | 42 | 44.5 | 62 | 68 |
| 32 | 48 | 51 | 70 | 76 |
| 36 | 53.5 | 57 | 78 | 84 |
| 40 | 59.5 | 63 | 86 | 92 |
| 50 | 74 | 78.5 | 106 | 112 |