ISO Triangle Screw - ISO Triangle Screw

Japanese: ISO 三角ねじ - あいえすおーさんかくねじ
ISO Triangle Screw - ISO Triangle Screw

...The angle of the thread is 60°, the nominal diameter is in inches, and the pitch is expressed as the number of threads per inch. (4) ISO triangular thread A triangular thread established by ISO in 1958 as a recommended standard. ISO metric threads (which differ slightly from the aforementioned metric threads in the shape of the thread and the relationship between the outer diameter and the pitch) have been used for general fastening in European countries that use the metric system, such as France and Germany, since their establishment, and have also been widely used in Japan since their introduction into the JIS in 1965. ...

*Some of the terminology that refers to "ISO triangle thread" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…ねじ山の角度は60゜,呼び径はインチでピッチは1インチについての山数で表されている。(4)ISO三角ねじ ISOが推薦規格として1958年に定めた三角ねじ。ISOメートルねじ(前述のメートルねじとは,ねじ山の形状および外径とピッチの関係が多少異なる)は制定後フランス,ドイツなどメートル法使用のヨーロッパ諸国で一般締結用として使用され,日本でも65年JISに導入されて以来広く使用されている。…

※「ISO 三角ねじ」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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