A wire thread insert (also known as a helical thread insert or coil insert) is a mechanical component used to repair or reinforce damaged or worn threaded holes. It is typically made from high-strength stainless steel wire and features a coiled design that restores or strengthens the original threads, ensuring that bolts, screws, or other fasteners can be securely fastened.

• Thread Repair: When a threaded hole becomes stripped or damaged, a wire thread insert can be inserted to recreate the original threads, allowing the use of standard fasteners without the need to replace the entire part.
• Strengthening Threads: In softer materials, such as aluminum or plastics, a wire thread insert can provide additional support to the threads, improving their load-bearing capacity.
• Preventing Thread Damage: In high-stress applications, wire inserts help distribute loads more evenly, reducing the likelihood of thread stripping or loosening.
• Corrosion Resistance: Inserts made from corrosion-resistant materials like stainless steel or other alloys offer increased protection against rust and wear, especially in harsh environments.

• Aerospace: Used extensively in the repair and assembly of aircraft and spacecraft components, where high precision and strength are required.
• Automotive: Common in engine blocks, chassis, and transmission systems to repair or reinforce damaged threads in soft metals like aluminum.
• Manufacturing: Used in heavy machinery and equipment to restore or enhance threaded connections, particularly during repair and maintenance.
• Electronics: Used in high-precision electronics to ensure reliable and secure fastening in devices with small or delicate components.

304 is a general-purpose stainless steel that is widely used to make equipment and machine parts that require good all-round performance (corrosion resistance and formability). In order to maintain the corrosion resistance inherent in stainless steel, the steel must contain more than 18% chromium, more than 8% nickel content. 304 stainless steel is a grade of stainless steel produced according to the American ASTM standard.