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Metric Keensert® Style Threaded Inserts

What is a Metric Keensert® Style Threaded Insert?

The Metric Keensert® threaded insert is a precision-engineered key locking insert that is widely used in the industry and adheres to rigorous standards, including NA0146, NA0147, NA0148, NA0149, NA0150, and NA0151. It differentiates itself from inch and mil-spec Keenserts® due to its metric thread diameter and pitch sizes, measured in millimeters (mm), which range from M2 (2mm) x 0.4 to M33 (33mm) x 2.0. It is available in several series: Miniature & Thinwall (KNM, KNCM), commonly used in compact spaces or with smaller screws; Heavy Duty & Thickwall (KNHM), ideal for applications requiring higher load-bearing capacity; and the Solid (KNJM) series, known for superior strength and durability, which is often preferred for use in softer parent materials or where significant reinforcement of the base material's integrity is needed.

These metric key locking inserts are available in Locking and Non-Locking styles and are designed to cover a broad range of applications across various industries, including aerospace, automotive, manufacturing, and industrial machinery.

Metric Keensert® Style Threaded Inserts at MF Supply

Choose from the metric Miniature & Thinwall (KNM, KNCM), Heavy Duty & Thickwall (KNHM), or Solid (KNJM) series Keenserts® style key locking inserts available below to see available materials and sizes

MF Supply is a leading supplier of Metric Keensert® style keylocking inserts including major brands and equivalents to Acme, Alcoa, Camloc, Clarendon, Fairchild, Kaynar, Microdot and Tridair Keenserts® & Keyserts. Our products are DFAR compliant with COC and full certifications available upon request.

Metric Kensert® Style Threaded Inserts Styles Available

Our catalog of metric Keenserts® style threaded inserts include Lightweight, Miniature & Thinwall (KNCM & KNM), Heavy Duty & Thickwall (KNHM), Extra Heavy Duty (KNHXHM) and Solid series in Locking and Non-Locking styles. Below we list the main metric styles available.

Metric Miniature & Thinwall (KNM & KNCM) Series

The Metric Keensert® style threaded inserts Miniature & Thinwall (KNM & KNCM) series are engineered for precision applications where space is not negotiable. Complying with stringent industry standards such as NA0146, NA0147, NA0148, and NA0149, these inserts are specifically designed for lightweight yet strong threading solutions. Ideal for electronics, instrumentation, and fine mechanical assemblies, the KNM & KNCM series is available in metric thread sizes from M2 x 0.4 to M12 x 1.75. These inserts offer a perfect balance of strength and minimal footprint, making them a go-to choice for engineers working in tight, compact environments where performance cannot be compromised.

Metric Heavy Duty & Thickwall (KNHM) Series

For applications that demand exceptional load-bearing capability and durability, the Metric Keensert® style threaded inserts Heavy Duty & Thickwall (KNHM) series stand out. Built to meet high standards, such as NA0150 and NA0151, these inserts excel in high-stress environments where maximum durability is critical. With thread sizes ranging from M4 x 0.7 to M24 x 3.0, the KNHM series is ideal for heavy industrial use, including automotive engines, structural components, and aerospace systems. Their robust design ensures secure and lasting thread reinforcement in soft or load-bearing materials, making them a reliable choice for critical applications that require reinforced stability.

Metric Solid (KNJM) Series

The Metric Keensert® style threaded inserts Solid (KNJM) series are the ultimate solution for scenarios requiring even stronger reinforcement in compromised, weak, damaged, or soft materials. Known for their solid construction and unmatched durability, these inserts are designed to provide high-strength threading in the most demanding environments. Available in thread sizes from M8 x 1.25 to M33 x 2.0, the KNJM series is perfect for applications that involve significant wear and tear, such as defense systems, aerospace components, and heavy machinery. Offering the highest level of performance, these solid inserts ensure permanent, reliable thread reinforcement where other solutions might fail, making them indispensable for mission-critical applications.

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Why Buy Metric Keenserts® Style Threaded Inserts from MF Supply?

With over 50 years of experience as a supply chain partner to manufacturers, and deep and broad expertise in Metric fasteners and inserts, MF Supply can help with all your fastening and hardware needs.

We stock and source a huge inventory of Metric key-locking inserts including Lightweight, Miniature & Thinwall / KNCM & KNM Series, Heavy Duty & Thickwall / KNHM Series & Extra Heavy Duty/ KNHXHM Series Duty in Locking and Non-Locking styles. Standard materials offered include Stainless Steel, A286, Nitronic 60, 4140 Alloy and Carbon Steel. Standard sizes run from M2 through M24.

Additional Metric product lines include Solid inserts & Mil-Spec keylocking inserts, installation tools and kits. Special materials and nonstandard sizes may be available for special orders with a lead time.

Can't find what you're looking for? Email us at [email protected] for a custom quote. "We have the right screw for you" is our motto after all!

Fastener & Electronic Hardware Specialists