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

The Heli-Coil 5521-3 Inch Coarse Thread Repair Kit offers a reliable and permanent solution for restoring damaged 10-24 threads in materials such as aluminum, magnesium, and cast iron. This professional-grade kit enables technicians to repair components effectively, reducing the need for costly replacements and minimizing downtime in demanding automotive and industrial environments. Utilizing precision-engineered Heli-Coil wire inserts, it creates robust internal threads that frequently surpass the original pull-out strength, ensuring a durable and reliable repair.

Key Features

• Precision 10-24 Thread Restoration: Specifically designed for 10-24 inch coarse threads with a .285" insert length, addressing a common fastener size across various 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 essential components for multiple repairs.
• Enhanced Durability & Wear Resistance: Heli-Coil inserts establish strong, wear-resistant threads that often exceed the strength of the parent material, guarding against future damage from wear, corrosion, galling, seizing, and rust.
• Accurate & Concentric Repairs: The precisely matched tap and installation tool ensure accurate alignment, facilitating concentric and straight threads for proper fastener seating and consistent torque retention.
• Professional-Grade Construction: Engineered for consistent, repeatable, and long-lasting thread repairs, making it a trusted solution in demanding automotive, industrial, and fleet maintenance operations.

Applications

This kit is ideal for repairing threaded holes in components where 10-24 hardware is frequently utilized. 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.

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"