Durable thread adapters/reducers built from carbon steel with hardened treatment and yellow zinc plating for long lasting performance in tough environments. Key benefits - Strong, wear resistant: high hardness and corrosion protection extend service life in metal assemblies. - Reliable fit in shallow holes: available in 10–15 mm length, designed to fully insert or bottom out/protrude as needed. - Easy to install and remove: a groove on the head accepts a flat-blade screwdriver for quick, tool-assisted operation. - Improves compatibility: bridges mismatched thread sizes and helps restore damaged or shallow threads for secure fastening. What you get - Material and finish: carbon steel, hardened, yellow galvanized for durability and corrosion resistance. - Size and fit: compact 10–15 mm length to suit shallow threaded holes; works with common metal threads. Use scenarios - Automotive or equipment brackets where hole depth is limited and a secure thread fit is required. - Metal furniture or machinery assemblies that need quick, repeatable thread adaptation. - Repair or retrofit projects to restore damaged threads or enable a different thread size without redesigning parts. Note: For best results, verify thread compatibility and hole depth before installation. This adapter is designed for metal applications where a shallow threaded hole is involved.