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Attention!
Please do not mistake this thread for the Whitworth Fine Thread BS 84.
This thread is an old one which is not used anymore. The nominal diameter and
the pitch are mentioned in millimeters or in TPI.
Used in locomotive construction approx. until 1975.
The flank angle is 55°.
|
Diameter for bolt and nut |
||||
| Thread Size | Tapping Drill Size | Core Area | TPI | Pitch |
| mm | cm2 | mm | ||
| W 60 x 1/6" LON | 54.58 | 23.40 | 6 | 4.23 |
| W 64 x 1/6" LON | 58.58 | 26.95 | 6 | 4.23 |
| W 68 x 1/6" LON | 62.58 | 30.76 | 6 | 4.23 |
| W 72 x 1/6" LON | 66.58 | 34.82 | 6 | 4.23 |
| W 76 x 1/6" LON | 70.58 | 39.12 | 6 | 4.23 |
| W 80 x 1/6" LON | 74.58 | 43.69 | 6 | 4.23 |
| W 84 x 1/6" LON | 78.58 | 48.50 | 6 | 4.23 |
| W 89 x 1/6" LON | 83.58 | 64.87 | 6 | 4.23 |
| W 94 x 1/6" LON | 88.58 | 61.63 | 6 | 4.23 |
| W 99 x 1/6" LON | 93.58 | 68.78 | 6 | 4.23 |
| W 104 x 1/6" LON | 98.58 | 76.33 | 6 | 4.23 |
| W 109 x 1/6" LON | 103.58 | 86.26 | 6 | 4.23 |
| W 114 x 1/6" LON | 108.58 | 92.60 | 6 | 4.23 |
| W 119 x 1/6" LON | 113.58 | 101.44 | 6 | 4.23 |
| W 124 x 1/6" LON | 118.58 | 110.44 | 6 | 4.23 |
| W 129 x 1/6" LON | 123.58 | 119.95 | 6 | 4.23 |
| W 134 x 1/6" LON | 128.58 | 129.85 | 6 | 4.23 |
| W 139 x 1/6" LON | 133.58 | 140.14 | 6 | 4.23 |
| W 144 x 1/6" LON | 138.58 | 150.83 | 6 | 4.23 |
| W 149 x 1/6" LON | 143.58 | 161.91 | 6 | 4.23 |
| W 154 x 1/6" LON | 148.58 | 173.39 | 6 | 4.23 |
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