60Pcs Stainless Steel Thread Insert Kit M3–M12 – Helicoil Style Thread Repair Set. 60 × Stainless Steel Thread Inserts (Mixed Sizes M3–M12). M12 × 1.75 × 2D – 5 pcs. M3 × 0.5 × 2D – 10 pcs. Thehelical coil structure distributes load evenly, helping improve thread strength and stability when fastening bolts or screws.
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