269 1. Shape and Dimensions of Hexagon Bolt (Parts Grade A) Reference 1. Priority should be given to the nominal of thread in Column . The screw size codes are based on JIS B 0123. 2. Recommended nominal lengths (L) for individual nominal of thread are enclosed by thick lines. 3. 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. 4. Max. value ℓg and Min. value ℓs as follows: ℓg max Nominal Length(L)-b, ℓs min.=ℓg max-5P(P=Coarse Thread Pitch) 5. da and r in this table are based on JIS B 1005. 6. "Chamfered" and "Unpointed", the shape of the end screw should be decided according to JIS B 1003. 7. The asterisked figures in the table are values after being corrected 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. g s Øds e s 15°~30° L (b) k C d ℓ ℓ k k' ℓf r r Øda Ødw Øds 0.1 X The shaded area indicates the range of the max. and min. throat dimension of a fillet weld. Enlarged view of Section X Incomplete Threaded Portion 2P or Less To be chamfered. May be roughed out when it is M4 or less. (Refer to JISB1003) dw min. dimension should be verified here. Unit: mm Nominal of Thread d Coarse Thread Column M2 M3 M4 M5 M6 M8 M10 M12 − M16 M20 M24 Coarse Thread Column − − − − − − − − M14 − − − Coarse Thread Pitch P 0.4 0.5 0.7 0.8 1 1.25 1.5 1.75 2 2 2.5 3 Fine Thread Column − − − − − M8×1 M10×1 M12×1.5 − M16×1.5 M20×1.5 M24×2 Fine Thread Column − − − − − − M10×1.25 M12×1.25 M14×1.5 − M20×2 − b (Reference) L≤125mm 10 12 14 16 18 22 26 30 34 38 46 54 125<L≤150mm − − − − − − − − 40 44 52 60 c Min. 0.1 0.15 0.15 0.15 0.15 0.15 0.15 0.15 0.15 0.2 0.2 0.2 Max. 0.25 0.4 0.4 0.5 0.5 0.6 0.6 0.6 0.6 0.8 0.8 0.8 da Max. 2.6 3.6 4.7 5.7 6.8 9.2 11.2 13.7 15.7 17.7 22.4 26.4 ds Reference Dimension=Max. 2 3 4 5 6 8 10 12 14 16 20 24 Min. 1.86 2.86 3.82 4.82 5.82 7.78 9.78 11.73 13.73 15.73 19.67 23.67 dw Min. 3.07 4.57 5.88 6.88 8.88 11.63 14.63 16.63 *19.64 22.49 28.19 33.61 e Min. 4.32 6.01 7.66 8.79 11.05 14.38 17.77 20.03 23.36 26.75 33.53 39.98 ℓf Max. 0.8 1 1.2 1.2 1.4 2 2 3 3 3 4 4 k Reference Dimension=Nominal 1.4 2 2.8 3.5 4 5.3 6.4 7.5 8.8 10 12.5 15 Min. 1.275 1.875 2.675 3.35 3.85 5.15 6.22 7.32 8.62 9.82 12.285 14.785 Max. 1.525 2.125 2.925 3.65 4.15 5.45 6.58 7.68 8.98 10.18 12.715 15.215 k' Min. 0.89 1.31 1.87 2.35 2.7 3.61 4.35 5.12 6.03 6.87 8.6 10.35 r Min. 0.1 0.1 0.2 0.2 0.25 0.4 0.4 0.6 0.6 0.6 0.8 0.8 s Reference Dimension=Max. 4 5.5 7 8 10 13 16 18 21 24 30 36 Min. 3.82 5.32 6.78 7.78 9.78 12.73 15.73 17.73 20.67 23.67 29.67 35.38 Length of Bolt L ℓs and ℓg Nominal Length (Reference Dimension) Min. Max. ℓs Min. ℓg Max. ℓs Min. ℓg Max. ℓs Min. ℓg Max. ℓs Min. ℓg Max. ℓs Min. ℓg Max. ℓs Min. ℓg Max. ℓs Min. ℓg Max. ℓs Min. ℓg Max. ℓs Min. ℓg Max. ℓs Min. ℓg Max. ℓs Min. ℓg Max. ℓs Min. ℓg Max. 16 15.65 16.35 4 6 20 19.58 20.42 8 10 5.5 8 25 24.58 25.42 10.5 13 7.5 11 5 9 30 29.58 30.42 15.5 18 12.5 16 10 14 7 12 35 34.5 35.5 17.5 21 15 19 12 17 40 39.5 40.5 22.5 26 20 24 17 22 11.75 18 45 44.5 45.5 25 29 22 27 16.75 23 11.5 19 50 49.5 50.5 30 34 27 32 21.75 28 16.5 24 11.25 20 55 54.4 55.6 32 37 26.75 33 21.5 29 16.25 25 60 59.4 60.6 37 42 31.75 38 26.5 34 21.25 30 16 26 65 64.4 65.6 36.75 43 31.5 39 26.25 35 21 31 17 27 70 69.4 70.6 41.75 48 36.5 44 31.25 40 26 36 22 32 80 79.4 80.6 51.75 58 46.5 54 41.25 50 36 46 32 42 21.5 34 90 89.3 90.7 56.5 64 51.25 60 46 56 42 52 31.5 44 21 36 100 99.3 100.7 66.5 74 61.25 70 56 66 52 62 41.5 54 31 46 110 109.3 110.7 71.25 80 66 76 62 72 51.5 64 41 56 120 119.3 120.7 81.25 90 76 86 72 82 61.5 74 51 66 130 129.2 130.8 80 90 76 86 65.5 78 55 70 140 139.2 140.8 90 100 86 96 75.5 88 65 80 150 149.2 150.8 96 106 85.5 98 75 90 GeneralTechnical Information Hexagon Bolts
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