We found one dictionary that defines the word symmetrical thread:

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1. SYMMETRICAL THREAD: Glossary on Terminology related to Nuts and Bolts

▸ Words similar to symmetrical thread ▸ Usage examples for symmetrical thread ▸ Idioms related to symmetrical thread ▸ Wikipedia articles (New!) ▸ Words that often appear near symmetrical thread ▸ Rhymes of symmetrical thread ▸ Invented words related to symmetrical thread