KEYSERT® key-locking inserts are designed for use in metals, plastics, and other materials to provide high-strength, wear-resistant threads. Their unique locking keys prevent rotation under vibration or heavy torque loads, making them a top choice for military, aerospace, and industrial applications where reliability is critical.
KEYSERT® by Howmet
NAPPCO Advantage: Your KEYSERT Specialist
NAPPCO stocks a wide selection of KEYSERT® inserts in both inch and metric sizes, offering technical guidance to ensure proper selection for your material and load requirements. We also provide installation tooling, repair support, and VMI programs to keep production on schedule and maintenance teams ready.
Top Products
Available in carbon steel, stainless steel, and heavy-duty versions, KEYSERT® products are designed for both OEM production and repair work, meeting stringent military and aerospace standards.
Carbon Steel & Stainless Steel KEYSERT®
High-strength carbon steel insert for general industrial use and stainless steel insert for corrosion resistance.
Solid KEYSERT®
Corrosion-resistant option for harsh environments.
Thin Wall KEYSERT®
Easy to install and remove and may be used on a variety of material.
Heavy-Duty & Extra Heavy-Duty KEYSERT®
Reinforced for maximum load capacity.
Installation Tools
Manual and pneumatic tools for efficient installation.
Industries Served
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Aerospace
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Automotive
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Defense
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Electronics
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Marine
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Industrial machinery
Common Applications
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Thread reinforcement in engine blocks
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Gear housings
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Control panels
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Precision instruments
