Metric Solid Keensert® Style Key Locking Inserts in Carbon Steel – KNJM-F Series

Looking for Metric Solid Carbon Steel Key Locking Inserts?

The metric Solid (KNJM-F) Keenserts® style threaded inserts series, made from carbon steel, provide an excellent balance of strength, toughness, and cost-efficiency. These key locking inserts are designed to deliver superior wear resistance, making them ideal for high-stress applications and heavy load environments, such as in the automotive, construction, and general industrial sectors. With carbon steel’s renowned strength-to-cost ratio, the solid KNJM-F insert series offers a durable and high-performance threading solution without exceeding budget constraints. Its locking keys, which securely anchor the insert, prevent rotation or loosening under extreme loads. The non-locking version ensures robust thread reinforcement, ideal for applications where vibration is minimal. Meanwhile, the self-locking variant provides extra protection against vibration-induced loosening, making it ideal for secure fastening under dynamic conditions. Whether reinforcing threads in heavy machinery, construction equipment, or industrial tools, these metric inserts perform consistently, offering a durable and secure fastening solution.

At MF Supply, we offer metric Solid KNJM-F Keensert® style key locking inserts in both locking and non-locking styles, including major brands and equivalents to Acme, Alcoa, Camloc, Clarendon, Fairchild, Kaynar, Microdot and Tridair Keenserts®, & Keyserts. Our mil-spec and certified products are DFAR compliant with COC and full certifications available upon request.

Stock sizes include M8 through M32 in Carbon Steel.

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