Hardlock Nut was included in “SHAKAIKA SHIRYOU 2016″.

Hardlock Nut was included in “SHAKAIKA SHIRYOU 2016″.

Our Hardlock nut was included in “SHAKAIKA SHIRYOU 2016″ as one of the most valuable products to support the Shinkansen.
BUNKEIDO.Co.,LTD publishes reference booklets for fifth grade elementary school students.

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