HEXAGON BOLT DIMENSION

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Reference:(1). Priority should be given to the nominal of thread in Column.
The screw size codes are based on JIS B 0123.

1. Recommended nominal lengths(L)for individual nominal of thread are enclosed by thick lines.
2. When the thread part length(b)of a bolt exceeds the max. nominal value given within the thick lines, the tolerance of the thread part length should be agreed upon by the delivering and receiving sides, corresponding to JIS B 1021.
3. Max. value ℓg and Min. value ℓs as follows:ℓg max Nominal Length(L)-b, ℓs min.=ℓg max-5P(P=Coarse Thread Pitch)
4. da and r in this table are based on JIS B 1005.
5. "Chamfered" and "Unpointed", the shape of the end screw should be decided according to JIS B 1003.
6. The asterisked figures in the table are values after correction with the relevant international standard.

*With some of the hexagon bolts and hexagon nuts for M10 and M12 distributed at present, the opposite side S is based on JIS prior to the revision.

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