Helicoil 5521-7 Thread Repair Kit, 7/16"-14TPI

Helicoil 5521-7 Thread Repair Kit, 7/16"-14TPI

The Helicoil 5521-7 thread repair kit is a SAE thread restoration solution for repairing stripped or damaged 7/16"-14 TPI threads. Using precision-formed 304 stainless steel wire inserts, it creates strong, durable internal threads that accept standard fasteners—because “just tighten it harder” is how threads become a memory.

Country of Origin
Varies by production batch

Key Features / Specifications

• Model / Part Number: 097-3750
• Manufacturer / Series: Helicoil 5521-7
• Product Type: SAE thread repair kit
• Thread Size: 7/16"-14 TPI
• Insert Material: 304 stainless steel
• Thread Form: Provides a conventional 60° internal screw thread
• Function: Restores stripped/damaged threads by installing a coil insert into a tapped hole
• Compatibility: Accommodates any standard 7/16"-14 bolt or screw

Ideal For

• Repairing stripped 7/16"-14 threads in machinery, automotive, and general equipment
• Creating stronger, longer-lasting threads in softer base materials
• Shop maintenance kits where common SAE thread repairs come up often
• Anyone who wants the fastener to hold… without needing “creative torque values”