美標UNC粗牙螺紋UNF標細牙螺紋攻絲底孔直徑及公差
發布時間:2022-08-02 金屬切削，機械制造
UNC 美標粗牙螺紋攻絲底孔直徑及公差
| 螺紋直徑 | 螺距 Gg/0“ TPI | 螺紋直徑 Ø mm | 底孔直徑 Ø mm | 底孔直徑 Ø mm min | 底孔直徑-Ø mm max |
| Nr. 1 | 64 | 1.854 | 1.550 | 1.425 | 1.582 |
| Nr. 2 | 56 | 2.184 | 1.850 | 1.694 | 1.872 |
| Nr. 3 | 48 | 2,515 | 2,10 | 1,941 | 2,146 |
| Nr. 4 | 40 | 2,845 | 2,35 | 2,156 | 2,385 |
| Nr. 5 | 40 | 3,175 | 2,65 | 2,487 | 2,697 |
| Nr. 6 | 32 | 3,505 | 2,85 | 2,642 | 2,896 |
| Nr. 8 | 32 | 4,166 | 3,50 | 3,302 | 3,531 |
| Nr. 10 | 24 | 4,826 | 3,90 | 3,683 | 3,962 |
| Nr. 12 | 24 | 5,486 | 4,50 | 4,343 | 4,597 |
| 1/4 | 20 | 6,350 | 5,10 | 4,976 | 5,268 |
| 516 | 18 | 7,938 | 6,60 | 6,411 | 6,734 |
| 38 | 16 | 9,525 | 8,00 | 7,805 | 8,164 |
| 716 | 14 | 1,112 | 9,40 | 9,149 | 9,550 |
| 12 | 13 | 12,70 | 10,80 | 10,584 | 11,013 |
| 916 | 13 | 14,288 | 12,20 | 11,996 | 12,456 |
| 58 | 11 | 15,875 | 13,50 | 13,376 | 13,868 |
| 34 | 10 | 19,050 | 16,50 | 16,299 | 16,833 |
| 78 | 9 | 22,225 | 19,50 | 19,169 | 19,748 |
| 1 | 8 | 25,400 | 22,25 | 21,963 | 22,598 |
| 1 1/8 | 7 | 28,575 | 25,00 | 24,648 | 25,349 |
| 1 1/4 | 7 | 31,750 | 28,00 | 27,823 | 28,524 |
| 1 3/8 | 6 | 34,925 | 30,75 | 30,343 | 31,120 |
| 1 1/2 | 6 | 38,100 | 34,00 | 33,518 | 34,295 |
| 1 3/4 | 5 | 44,450 | 39,50 | 38,951 | 39,814 |
| 2 | 4.5 | 50,800 | 45,00 | 44,689 | 45,598 |
UNF 美標細牙螺紋
| 螺紋直徑 Ø“ - | 螺距 Gg/1“ TPI | 螺紋直徑 Ø mm | 底孔直徑 Ø mm | 底孔直徑 Ø mm min | 底孔直徑-Ø mm max |
| Nr. 1 | 72 | 1,854 | 1,55 | 1,473 | 1,613 |
| Nr. 2 | 64 | 2,184 | 1,85 | 1,755 | 1,913 |
| Nr. 3 | 56 | 2,515 | 2,15 | 2,024 | 2,197 |
| Nr. 4 | 48 | 2,845 | 2,40 | 2,271 | 2,459 |
| Nr. 5 | 44 | 3,175 | 2,70 | 2,550 | 2,741 |
| Nr. 6 | 40 | 3,505 | 2,95 | 2,819 | 3,023 |
| Nr. 8 | 36 | 4,166 | 3,50 | 3,404 | 3,607 |
| Nr. 10 | 32 | 4,826 | 4,10 | 3,962 | 4,166 |
| Nr. 12 | 28 | 5,486 | 4,60 | 4,496 | 4,724 |
| 1/4 | 28 | 6,350 | 5,50 | 5,367 | 5,580 |
| 5/16 | 24 | 7,938 | 6,90 | 6,792 | 7,038 |
| 3/8 | 24 | 9,525 | 8,50 | 8,379 | 8,626 |
| 7/16 | 20 | 11,112 | 9,90 | 9,738 | 10,030 |
| 1/2 | 20 | 12,700 | 11,50 | 11,326 | 11,618 |
| 9/16 | 18 | 14,288 | 12,90 | 12,761 | 13,084 |
| 5/8 | 18 | 15,875 | 14,50 | 14,348 | 14,671 |
| 34 | 16 | 19,050 | 17,50 | 17,330 | 17,689 |
| 7/8 | 14 | 22,225 | 20,40 | 20,262 | 20,663 |
| 1 | 12 | 25,400 | 23,25 | 23,109 | 23,569 |
| 1 1/8 | 12 | 28,575 | 26,50 | 26,284 | 26,744 |
| 1 1/4 | 12 | 31,750 | 29,50 | 29,459 | 29,919 |
| 1 3/8 | 12 | 34,925 | 32,75 | 32,634 | 33,094 |
| 1 1/2 | 12 | 38,100 | 36,00 | 35,809 | 36,269 |
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