Threaded Inserts

KEENSERTS® Threaded Inserts 

These high-strength threaded inserts come with special locking keys that eliminate rotation and vibration even in heavy-duty applications. 

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KEENSERTS® threaded inserts are the perfect solution to prevent threads from becoming stripped in fields such as mechanical or precision engineering, aviation, and aerospace. Made of stainless steel (1.4305 / AISI 303), they are extremely durable and easily withstand numerous loosening and tightening cycles.  

KEENSERTS® are a great option for light metal, steel, or cast-iron applications. In addition, they can also be used as an easy, efficient replacement for damaged threads in expensive components.

Hand holding a Keenserts threaded insert

Special Key-Locking Technology

KEENSERTS® inserts are preassembled with special locking keys, which lock the inserts into place and thus prevent loosening even in heavy-duty applications. Depending on the thread size, key-locking inserts are available with two or four key locks, either with a regular or self-locking thread.

Advantages of KEENSERTS® Threaded Inserts

  • Easy installation
  • Highly durable
  • Efficient repair of damaged threads
  • Pre-assembled key locks

Overview of KEENSERTS® Fasteners

Threaded Inserts with 2 Key Locks 

Threaded Inserts with 2 Key Locks with white background.
  • Available standard internal thread sizes: M3x0.5 (type KNCM), M4x0.7 (type KNCM), M5x0.8 (types KNM & KNHM), and M6x1.0 (types KNM & KNHM)  
  • Material: stainless steel 1.4305  
  • Additional types available on request 

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Threaded Inserts with 2 Key Locks with white background.

Threaded Inserts with 2 Key Locks, Self-Locking 

Self-locking Keenserts threaded insert with 2 key locks on a white background.
  • Available standard internal thread sizes: M5x0.8 (types KNML & KNHML), M6x1.0 (types KNML & KNHML)  
  • Material: stainless steel 1.4305 with Molykote® surface treatment  
  • Additional types available on request 

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Self-locking Keenserts threaded insert with 2 key locks on a white background.

Threaded Inserts with 4 Key Locks 

A Keenserts threaded insert with 4 Key Locks on a white background.
  • Available standard internal thread sizes: M8x1.25 (types KNM & KNHM), M10x1.50 (types KNM & KNHM), M12x1.75 (types KNM & KNHM), and M16x2.00 (type KNHM)  
  • Material: stainless steel 1.4305  
  • Additional types available on request  

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A Keenserts threaded insert with 4 Key Locks on a white background.

Threaded Inserts with 4 Key Locks, Self-Locking 

Threaded Inserts with 4 Key Locks, Self-Locking on white background
  • Available standard internal thread sizes: M8x1.25 (types KNML & KNHML), M10x1.50 (types KNML & KNHML), M12x1.75 (types KNML & KNHML), and M16x2.00 (type KNHML)  
  • Material: stainless steel 1.4305 with Molykote® surface treatment  
  • Additional types available on request

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Threaded Inserts with 4 Key Locks, Self-Locking on white background

KEENSERTS® Installation Tools

Various tools and devices for threaded inserts on a white background.

We provide you with the right tools for the installation of KEENSERTS® threaded inserts. Find both hand installation tools and hydro-pneumatic power tools, as well as necessary equipment, in our eShop.

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Various tools and devices for threaded inserts on a white background.

Download More Information about KEENSERTS® Fasteners

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Key-Locking Inserts Brochure

Find more information and technical details about key-locking inserts in our brochure.

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