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Proof load of bolts, fine thread

Coarse threadISO 898-1 (JIS B 1051)呼び径ごとにピッチが決まっている一般的なねじです。特に指定がなければこちらを使います。Fine threadISO 898-1 (JIS B 1051)保証荷重応力は並目と同じです。ピッチが細かいぶん有効断面積が大きくなり、その分だけ保証荷重も大きくなります。
Thread designationPitch
[mm]		Tensile stress area
[mm2]		Proof load [N]

Notes

  • The proof load is the tensile stress area multiplied by the proof stress.The tensile stress area is calculated as given in JIS B 1082.Checked against the table in the source(JIS B 1051:2014, Table 7).
  • The table covers only the 16 designations given in the source.A blank means that that property class is not specified for that size (property class 9.8 applies only up to 16 mm).
  • The values here are for room temperature.Mechanical properties change at high and low temperatures, so do not apply these values directly.
  • Sources: JIS B 1051, JIS B 0205-4, JIS B 1082
Bolts — Proof load — Proof load of bolts, fine thread | Updraft - Mechanical Engineering Calculators