Inch Coarse Thread Repair Kit - 10-24 x .285 - Heli Coil Products

The Heli-Coil 5521-3 Inch Coarse Thread Repair Kit provides a robust and permanent solution for restoring damaged 10-24 threads in a variety of soft metals such as aluminum and magnesium. This professional-grade kit enables technicians to repair components rather than replace them, significantly reducing downtime and material costs in demanding automotive and industrial settings. Utilizing precision-formed Heli-Coil wire inserts, it creates internal threads that often exceed the original pull-out strength, ensuring a durable and reliable repair.

Key Features

• Precision 10-24 Thread Restoration: Specifically engineered for 10-24 inch coarse threads with a .285" insert length, addressing a common fastener size in light-duty and critical applications.
• Comprehensive Professional Kit: Includes a correctly sized high-speed steel tap, a durable installation tool, and multiple 18-8 stainless steel Heli-Coil inserts, providing all necessary components for several reliable repairs.
• Enhanced Durability & Wear Resistance: Heli-Coil inserts create strong, wear-resistant threads that are often stronger than the original material, preventing future damage from wear, corrosion, galling, seizing, and rust.
• Accurate & Concentric Repairs: The matched tap and installation tool facilitate accurate alignment, ensuring concentric and straight threads for proper fastener seating and consistent torque retention.
• Professional-Grade Construction: Designed for consistent, repeatable, and long-lasting thread repairs, making it a trusted solution in demanding automotive, industrial, and fleet maintenance environments.

Applications

This kit is ideal for repairing threaded holes in components where 10-24 hardware is commonly used. In automotive and powersports contexts, common repair points include engine covers, accessory brackets, throttle and sensor mounts, small manifolds, electrical component mounting bosses, and sheet-metal attachments. For industrial and plant maintenance, the 5521-3 kit is well-suited for repairing threaded holes in guard panels, control boxes, machine housings, fixtures, and general MRO (Maintenance, Repair, and Operations) tasks. It effectively works in materials like aluminum, magnesium, and cast iron.

Specifications

• Manufacturer: Heli Coil Products
• Model: 5521-3
• Thread Type: Inch Coarse
• Thread Size: 10-24
• Insert Length: 0.285"
• Approximate Weight: 1 lb
• Package Dimensions: 4.5" x 3.5" x 0.5"