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Technical drawing of the cross-section 55 degree flank angle

Whitworth Fine Thread DIN LON 287

The Whitworth Fine Thread DIN LON 287 is a thread from locomotive construction, primarily used for piston fastening. It has not been in use since the mid-1970s. The Whitworth Fine Thread DIN LON 287 is standardized according to DIN (30)287 or LON 287, with LON standing for German Locomotive Standards. The currently used British Whitworth Fine Thread according to BS 84 is not related to the Whitworth Fine Thread DIN LON 287 and should not be confused with it.

The flank angle for the Whitworth Fine Thread DIN LON 287 is 55°. The pitch is measured in threads per inch, consistently at 6.

The thread designation consists of four components: the abbreviation W for Whitworth, the external diameter, the pitch in the form of 1/6″, and the addition of LON as a reference to the standard. Thus, a thread identification might be, for example, W 72 x 1/6″ LON.

The thread table for the Whitworth Fine Thread DIN LON 287 covers nominal diameters from 60 mm upwards. Threads with dimensions below this threshold are standardized according to DIN LON 286 and are found there. The table below lists the core diameter and core cross-section in cm², as well as the pitch in mm and threads per inch. Although the Whitworth Fine Thread DIN LON 287 is no longer in use, if you need dies or taps for your work according to this standard, we are happy to create custom-made items for you.

To the overview thread standards
Diameter of bolt and nut
Thread identificationCore diameter mmCore cross-section cm2Gears per inchPitch mmTaps in our Online-ShopDies in our Online-Shop
W 60 x 1/6″ LON54,5823,4064,23Link to the tapLink to the thread cutting die
W 64 x 1/6″ LON58,5826,9564,23Link to the tapLink to the thread cutting die
W 68 x 1/6″ LON62,5830,7664,23Link to the tapLink to the thread cutting die
W 72 x 1/6″ LON66,5834,8264,23Link to the tapLink to the thread cutting die
W 76 x 1/6″ LON70,5839,1264,23Link to the tapLink to the thread cutting die
W 80 x 1/6″ LON74,5843,6964,23Link to the tapLink to the thread cutting die
W 84 x 1/6″ LON78,5848,5064,23Link to the tapLink to the thread cutting die
W 89 x 1/6″ LON83,5864,8764,23Link to the tapLink to the thread cutting die
W 94 x 1/6″ LON88,5861,6364,23Link to the tapLink to the thread cutting die
W 99 x 1/6″ LON93,5868,7864,23Link to the tapLink to the thread cutting die
W 104 x 1/6″ LON98,5876,3364,23Link to the tapLink to the thread cutting die
W 109 x 1/6″ LON103,5886,2664,23Link to the tapLink to the thread cutting die
W 114 x 1/6″ LON108,5892,6064,23Link to the tapLink to the thread cutting die
W 119 x 1/6″ LON113,58101,4464,23Link to the tapLink to the thread cutting die
W 124 x 1/6″ LON118,58110,4464,23Link to the tapLink to the thread cutting die
W 129 x 1/6″ LON123,58119,9564,23Link to the tapLink to the thread cutting die
W 134 x 1/6″ LON128,58129,8564,23Link to the tapLink to the thread cutting die
W 139 x 1/6″ LON133,58140,1464,23Link to the tapLink to the thread cutting die
W 144 x 1/6″ LON138,58150,8364,23Link to the tapLink to the thread cutting die
W 149 x 1/6″ LON143,58161,9164,23Link to the tapLink to the thread cutting die
W 154 x 1/6″ LON148,58173,3964,23Link to the tapLink to the thread cutting die