Helicoil Thread Repair Kit, 5/8" x 11 NC (5521-10)
Helicoil 5521-10 Thread Repair Kit 5/8" x 11 NC is designed to restore stripped, worn, or damaged 5/8" x 11 NC threaded holes. This high-quality repair kit provides a reliable and permanent solution for a variety of applications, including automotive, industrial, and machinery repairs. The Helicoil Thread Repair Kit 5/8" x 11 NC 5521-10 includes all necessary components to restore threads efficiently, preventing the need for costly part replacements.
Designed for 5/8" x 11 NC thread size.
Quickly restores damaged threads to their original size.
Works with various materials, including aluminum, magnesium, cast iron, and bronze.
Lightweight and durable inserts provide long-lasting thread strength.
Prevents the need to scrap expensive parts.
Ensures strong and secure thread repairs.
Compatible with fuel-efficient vehicle materials.
Provides a cost-effective solution for thread restoration.
Technical Specifications:
Thread Size: 5/8" x 11 NC
Drill Size: 37/64" (Drill bit not included.)
Tap Part No.: 821-9
Installation Tool Part No.: 2299-9
Insert Package Part No.: R1191-9
Number of Inserts: 6 per kit
Product identification
- Brand: Helicoil
- Model / MPN: 5521-10




