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Drawing Nomenclature

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Hush

Hush

Mechanical
Dec 21, 2001
317
Ran across a drawing notation specifying: 'Higby first and last thread'. I'm assuming this is asking for a blunt start thread but am curious as to the term's origin and as to whether it is or was ever in common usage.
 
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It is common at our shop. And yes it means blunt start.

You can check Machinist Handbook.
 
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