最終更新日：2022/12/24
The recommended tap drill for a ½-13 UNC tap is 0.421
, resulting in a 75 percent thread.
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The recommended tap drill for a ½-13 UNC tap is 0.421
, resulting in a 75 percent thread.
DiQt（ディクト）
無料
★★★★★★★★★★
