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| UNC美制粗螺纹Unified Coarse Threads (60° | |||||
| 称呼 | 牙数 | 等级 | |||
| 3 A | 2A | 1A | |||
| No.2 | 56 | 1.89 -1.87 | 1.86-1.84 | ||
| No.3 | 48 | 2.17 -2.15 | 2.14-2.11 | ||
| No.4 | 40 | 2,42-2.40 | 2.40-2.36 | ||
| No.5 | 40 | 2.75 -2.73 | 2.72-2.69 | ||
| N6.6 | 32 | 2.98 -2.95 | 2.95-2.91 | ||
| No.8 | 32 | 3,64-3.61 | 3.60-3.57 | ||
| No.10 | 24 | 4.12 -4.09 | 4.09-4.05 | ||
| No.12 | 24 | 4.78 -4.75 | 4.75-4.70 | ||
| 114 | 20 | 5.53 -5.50 | 5.50-5.45 | ||
| 5/16 | 18 | 7.03 -8.99 | 6.98-6.93 | ||
| 3/8 | 16 | 8.50 -8.46 | 8.45-8.40 | 5.47-5.40 | |
| 7/16 | 14 | 9.94 -9.90 | 9.89-9.83 | 6.69-6.88 | |
| 112 | 13 | 11.44-11.39 | 11.39-11.32 | 8.43-8.34 | |
| 9/16 | 12 | 12.92-12.87 | 12.87-12.80 | 9.86-9.77 | |
| 5/8 | 11 | 14.39-14.34 | 14.33-14.26 | 11.35-1126 | |
| 3/4 | 10 | 17.41-17.35 | 17.34-17.27 | 12-83-12.73 | |
| 7/8 | 9 | 20, 40-20.34 | 20.34-20.26 | 14.30-14.19 | |
| 1 | 8 | 23.35-23.29 | 23.28-23.20 | 17.31-17.20 | |
| 11/8 | 7 | 26.24-26.17 | 26.16-26.07 | 20.30-20.17 | |
| 11/4 | 7 | 29.41-29.34 | 29.33-29.24 | 23.24-23.11 | |
| 13/8 | 6 | 32.20-32.13 | 32,12-32.02 | 26.12-25.98 | |
| 112 | 6 | 35.35-35.20 | 35.29-35.08 | 29.28-29.14 | |
| 13/4 | 5 | 41.15-40.98 | 41.08-40.85 | 32.07-31.91 | |
| 2 | 41/2 | 47.13-46.95 | 47.06-46.82 | 35.29-34.98 | |
| Mm公制螺纹Metric Threads (60° | ||||||
| 称呼 | 牙数 | 等级 | ||||
| 3 A | 2A | 1 A | ||||
| M2 | 0.4 | 1.73 -1.71 | 1.70-1.67 | 1.68 -1.64 | ||
| 2.3 | 0.4 | 2.03 -2.01 | 2.00-1.97 | 1.98-1,94 | ||
| 2.6 | 0,45 | 2.29 -2.27 | 2.26-2.23 | 2,25-2.21 | ||
| M3 | 0.5 | 2.66 -2.64 | 2.63-2.60 | |||
| 3.5 | 0.6 | 3.10 -3.08 | 3.06-3.03 | 3,05-3.00 | ||
| 4 | 0.7 | 3.54 -3.51 | 3.49-3.45 | |||
| 4.5 | 0.75 | 4.01 -3.98 | 3.96-3.92 | 3.94 -3.88 | ||
| 5 | 0.8 | 4.47 -4.44 | 4.43-4.38 | 4.40 -4.33 | ||
| 6 | 1 | 5.34 -5.31 | 5.30-5.25 | 5.28 -5.21 | ||
| 7 | 1 | 6.34 -6.31 | 6.30-6.25 | 6.28 -6.21 | ||
| 8 | 1.25 | 7.18 -7.14 | 7.12-7.07 | 7.10 -7.03 | ||
| 10 | 1.5 | 9.03 -8.99 | 8.978.91 | 8.94 -8.86 | ||
| 12 | 1.75 | 10.86-10.82 | 10.79-10.73 | 10.77- 10.69 | ||
| 14 | 2 | 12.70-12.65 | 12.63-12.56 | 12.61-12.52 | ||
| 16 | 2 | 14.70-14.65 | 14.63-14.56 | 14.61-14.52 | ||
| 18 | 2.5 | 16.38-16.33 | 16.31-16.23 | 16.28-16.17 | ||
| 20 | 2.5 | 18.38-18.33 | 18.31-18.23 | 18,28-18.17 | ||
| 22 | 2.5 | 20.38-20.33 | 20.31-20.23 | 20.28-20.17 | ||
| 24 | g | 22.07-22.01 | 21.98-21.90 | 21.96-21.85 | ||
| 27 | 25.08- 25.00 | 24.98-24.89 | 24.95-24.84 | |||
| 30 | 3.5 | 27.75-2768 | 27.66-27.56 | 2763-27.50 | ||
| 33 | 3.5 | 30.74-30.68 | 30.65-30.56 | 30.62-30.50 | ||
| 36 | 4 | 33.43-33.37 | 33.33-33.23 | 33.29-33.16 | ||
| 39 | 4 | 36.43-36.36 | 36.32-36.22 | 36.27-36.11 | ||
| 42 | 4.5 | 39.11-39.04 | 39.01-38,90 | 38.97-38.82 | ||
| 45 | 4.5 | 42.11-42.04 | 42. 00-41.90 | 41.96-41.82 | ||
| 48 | 5 | 44.75-4460 | 44.68-44.45 | 44.68-44.37 | ||
| UNF美制细螺纹Unified Fine Threads (60° ) | |||||
| 称呼 | 牙数 | 等级 | |||
| 3 A | 2A | 1A | |||
| No.6 | 40 | 3.08 -3.06 | 3.05-3.02 | ||
| No.8 | 36 | 3.69 -3.67 | 3.66-3.63 | ||
| No.10 | 32 | 4.29 -4.26 | 4.26-4.22 | ||
| No.12 | 28 | 4.88 -4.85 | 4.84-4.80 | ||
| 114 | 28 | 5.75 -5.72 | 5.72-5.68 | 5.70-5.63 | |
| 5/16 | 24 | 7.24 -7.21 | 7.20-7.16 | 7.18-7.11 | |
| 3/8 | 24 | 8,83-8.79 | 8.79-8.74 | 8.76-8.69 | |
| 7/16 | 20 | 10.28-10.24 | 10.23-10.18 | 10.21-10.13 | |
| 1/2 | 20 | 11.86-11.82 | 11.82-11.76 | 11.79-11.71 | |
| 9/16 | 18 | 13,36-13.32 | 13.31-13.25 | 13,28-13.19 | |
| 5/8 | 18 | 14.94-14.90 | 14.89-14.83 | 14.86-14.77 | |
| 3/4 | 16 | 18.00-17.96 | 17.95-17.89 | 17.92-17.82 | |
| 7/8 | 14 | 21.03- 20,98 | 20.98-20.91 | 20.94-20.84 | |
| 1 | 12 | 24.01-23.96 | 23.95-23.87 | 23.91-23.80 | |
| 11/8 | 12 | 27,19-27.13 | 27.12-27.05 | 27.08-26.97 | |
| 11/4 | 12 | 30.36- 30.30 | 30.29-30.21 | 30.25-30.14 | |
| 13/8 | 12 | 33.53-33.47 | 33.46-33.38 | 33.42-33.30 | |
| 11/2 | 12 | 36.70- 36.64 | 36.63-36.55 | 36.59-36.47 | |
| BSW英制螺纹Whit Worth CoarseThreads (55° ) | |||
| 称呼 | 2级 | 3级 | 4级 |
| W3/32-48 | 204-2.01 | 2,03-2.00 | 2.00 -1.95 |
| 1/8-40 | 2.75 -2.72 | 2.74 -2.69 | 2,71-2.65 |
| 5/32-32 | 3.43 -3.39 | 3.41 -3.36 | 3.40 -3.34 |
| 3/16-24 | 408-4.05 | 4.06 -4.02 | 4.04 -3.97 |
| 114-20 | 5.51 -5.46 | 5.49 -5.42 | 5.47 -5.38 |
| 5/16-18 | 7.01 -6.95 | 6.99 -6.91 | 6.97 -6.87 |
| 3/8-16 | 8.48 -8.41 | B.46-8.37 | 8.44 -8.33 |
| 7/16-14 | 9.92 -9.85 | 9.90 -9.81 | 9,87-9.76 |
| 1/2-12 | 11.31-11.24 | 11.29-11.19 | 11.27-11.15 |
| 9/16-12 | 12.89-12.82 | 12.87-12.77 | 12.85-12.73 |
| 5/8-11 | 14.36-14.29 | 14.34-14.24 | 14.31-14.18 |
| 3/4-10 | 17,38-17.30 | 17.36-17.25 | 17.33-17.19 |
| 718-9 | 20.38-20.29 | 20.34-20.23 | 20.32-20.18 |
| 1-8 | 23.32-23.23 | 23.29-23.17 | 23.26-23.11 |
| PT、PS、PF、英制管牙Pipe Threads (55° ) | |||||
| 称呼 | 牙数 | 等级 | PT | ||
| A 级 | B级 | 小径 | |||
| 1/16 | 28 | 7.10 -7.05 | 7.05-6.94 | 6.89 -6.78 | |
| 1/8 | 28 | 9.10 -9.05 | 9.05-8.94 | 8.90 -8.79 | |
| 1/4 | 19 | 12.25-12.19 | 12.19-12.07 | 11.92-11.80 | |
| 3/8 | 19 | 15.76-15.69 | 15.69-15.57 | 15.41-15.29 | |
| 1/2 | 14 | 19.74-19.67 | 19.67-19.53 | 19.28-19.14 | |
| 3/4 | 14 | 25.22-25.15 | 25.15-25.01 | 24.68-24.54 | |
| 1 | 11 | 31.70-31.61 | 31.61-31.43 | 31.12-3094 | |
| 11/4 | 11 | 40.43-40.34 | 40.34-40.16 | 39.64-39.46 | |
| 11/2 | 11 | 46.32-46.23 | 46.23-46.05 | 45.53-45.35 | |
| 2 | 11 | 58.14-58.05 | 58.05-57-87 | 57.14-56.96 | |
| NPT.NPS美制管牙Pipe Threads (60° ) | |||||
| 称呼 | 牙数 | 等级 | PT | ||
| A 级 | B级 | 小径 | |||
| 1/16 | 27 | 7.44 -7.39 | 7.39-7.28 | 6.89 -6.78 | |
| 1/8 | 27 | 9.44 -9.39 | 9.39-9.28 | 9.24 -9.13 | |
| 1/4 | 18 | 12.43-12.37 | 12.37-12.25 | 12.11-11.99 | |
| 3/8 | 18 | 15.88-15.82 | 15.82-15.70 | 15.53-15.41 | |
| 112 | 14 | 19.72-19.65 | 19.65-19.51 | 19.26-19.12 | |
| 3/4 | 14 | 25,06-24.99 | 24.99-24.85 | 24.52-24.33 | |
| 1 | 11.1/2 | 31.39-31.30 | 31.30-31.12 | 30.81-30.63 | |
| 11/4 | 111/2 | 40.21-40.12 | 40.12-39.94 | 39.42-39.24 | |
| 112 | 111/2 | 46.28-46.19 | 46.19-46.01 | 45.49-45.31 | |
| 2 | 11.1/2 | 58.33-46.24 | 46.24-46.06 | 57.33-57.15 | |