Thread Sizes: M6 / M8 / M10. M8 × 1.25 — 11.7 mm & 16.2 mm inserts. M10 × 1.25 — 14 mm & 20 mm inserts. M6 × 1.0 — 9.4 mm & 12 mm inserts. During installation, the lower threads are cold-rolled into the base material, locking the insert securely in place.