KATO是双向Tangless®螺纹嵌件的原始发明者和制造商。 KATO Fastening Systems，Inc。（KATO）成立于1997年，服务于北美紧固件市场。 KATO生产革命性的Tangless®线圈螺纹刀片，标准线圈螺纹（切边）刀片和Hexatorq（恒转矩精密铰链）。

KATO Tangless Inserts在形式，配合和功能上与传统的切边插入件（例如，CoilThread，Heli-Coil和Recoil）相同。 实际上，除了安装和拆卸方法之外，Tangless Coil Thread Inserts与各种方式的切边刀片相同。 KATO Tangless刀片甚至具有相同的采购规格（统一尺寸的NASM8846和公制尺寸的MA1565）作为切边刀片。 KATO Tangless刀片消除了脱落和取出，安装后可轻松调节，并提供无损去除。 此外，Heli-Coil和Recoil Tangless刀片均经KATO许可生产！

KATO is the original inventor and manufacturer of the bi-directional Tangless® screw thread insert. KATO Fastening Systems, Inc. (KATO) was established in 1997 to serve the North American fastener market. KATO manufactures the revolutionary Tangless® CoilThread Insert, standard CoilThread (tanged) inserts, and Hexatorq (constant torque precision hinges).

KATO Tangless Inserts are identical, in form, fit, and function to conventional tanged inserts (e.g.,CoilThread, Heli-Coil & Recoil). In fact, Tangless CoilThread Inserts are identical to tanged inserts in every way except for their method of installation & removal. KATO Tangless inserts even have the same procurement specification (NASM8846 for unified sizes and MA1565 for metric sizes) as tanged inserts. KATO Tangless inserts eliminate tang break-off and retrieval, are easily adjusted after installation, and offer non-destructive removal. In addition, Heli-Coil and Recoil Tangless inserts are manufactured under license from KATO!