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Proof load of stainless steel nuts, fine thread

Steel nuts (coarse thread)ISO 898-2 (JIS B 1052-2)Unlike bolts, the proof stress rises with nominal diameter within the same property class.Steel nuts (fine thread)ISO 898-6 (JIS B 1052-6)並目ねじとは別の規格です。同じ強度区分でも応力が高く、使える呼び径の範囲も狭くなります。Stainless steel nuts (coarse thread)ISO 3506-2 (JIS B 1054-2)保証荷重応力は呼び径では変わらず、ナットの高さで 2 つに分かれます。Stainless steel nuts (fine thread)ISO 3506-2 (JIS B 1054-2)保証荷重応力は並目ねじと同じです。有効断面積が大きくなるぶん、保証荷重も大きくなります。
Thread designationProof load [N]
Proof stress
[N/mm2]

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.The source has no proof load table。規格が定めているのは 保証荷重応力までです。
  • Fine thread nuts may not meet the proof load requirement.The source states that, because of the fine thread or the shape of the nut, some nuts may not meet the proof load requirement.
  • The source does not state how the standard height and the thin nut correspond.The standard defines only how to read the three digits: the leading 0 marks a thin nut, and the next two digits are one tenth of the proof stress.halving the stress and rounding down to a multiple of 50 gives exactly one pairing, so that is the order used here (F1 at 45 comes out as 200 rather than 225).
  • 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 1054-2, JIS B 0205-4, JIS B 1082
Proof load — Proof load of stainless steel nuts, fine thread | Updraft - Mechanical Engineering Calculators