Helicoil 5521-6 Thread Repair Kit for 3/16" x 16 Engine Threads

Restore damaged or stripped 3/16" x 16 threads in cam cover screws, tappet guides, oil pump studs, timing components, and mounting threads with the Helicoil 5521-6 Thread Repair Kit. The thread length is approximately 9/16 inch, delivering a precise, original-dimension repair that supports reliable fastener engagement.

The kit includes a precision tap, 12 inserts, and complete installation instructions to guide a correct, durable repair. Helicoil’s insert system provides a secure, lasting fix that restores thread integrity and helps prevent future damage, extending the life of engine components.

Made in the USA, this kit is designed for demanding applications and consistent threading with minimal effort. Its compact design makes it suitable for professional repair shops and DIY enthusiasts working on engines and machinery alike.

Applications include cam cover screws, tappet guides, oil pump studs, and other engine threads on small motorcycle engines and various machinery, offering a versatile solution for restoring critical thread integrity.

Included accessories

• Mini Motorcycle Lift Tool
• Gasoila Red Varnish Sealant
• Gasgacinch Gasket Sealer

Thread repair kit is for cam cover screw tappet guide oil pump stud timer and mounting threads. Thread size is 3/16 inch x 16 with length of.562 inch. This kit includes tap tool 12 inserts and complete instructions.

The Helicoil 5521-6 Thread Repair Kit is an essential tool for repairing damaged or stripped threads in various engine components. Designed for threads measuring 3/16 inch x 16, with a length of approximately 9/16 inch, this kit is suitable for cam cover screws, tappet guides, oil pump studs, timing components, and mounting threads. The kit includes a precision tap, 12 durable inserts, and comprehensive instructions to ensure proper installation and reliable repair. Whether working on small motorcycle engines or other machinery, this versatile repair kit provides a professional-grade solution to restore thread integrity and prevent future damage.
The Helicoil brand is known for its high-quality thread repair products, offering durability and ease of use. Made in the USA, this kit is built for demanding applications and ensures accurate threading with minimal effort. The included insert system provides a secure and lasting fix that restores original thread dimensions, extending the lifespan of your engine components and reducing the need for costly replacements. Its compact kit design makes it convenient for both professional repair shops and DIY enthusiasts.
The Helicoil Thread Repair Kit is compatible with a variety of applications, making it a valuable addition to any mechanic's toolkit. The included accessory items, such as the Mini Motorcycle Lift Tool, Gasoila Red Varnish Sealant, and Gasgacinch Gasket Sealer, complement the repair process by facilitating component handling and sealing, ensuring optimal performance and durability of your repaired threads.

Features:

• Thread size: 3/16 inch x 16, with a length of approximately 9/16 inch

• Includes tap tool, 12 inserts, and complete installation instructions

• Suitable for cam cover screws, tappet guides, oil pump studs, and other engine threads

• Manufactured by Helicoil in the USA for high durability and reliability

• Versatile repair solution for a variety of engine and machinery applications