Whitworth Fine Thread 2 DIN LON 287, 6 TPI

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
mm
Core Area
cm2
TPI Pitch
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