> For the complete documentation index, see [llms.txt](https://www.ftcwiki.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://www.ftcwiki.org/manufacturing-and-assembly/fasteners-and-tooling/threading-and-tapping.md).
# Threading and Tapping
Fasteners are critical in FTC manufacturing, holding together everything from chassis rails to motor mounts. Common FTC fasteners include socket head screws, hex bolts, nuts, washers, and standoffs—most using **M4** threads.
Thread Tapper for a Drill press, used to thread holes
Threaded Plate from Gobilda - SKU: 2803-0023-0007
Threading refers to the spiral grooves inside a hole or on the outside of a shaft that allow a fastener to grip and hold. In FTC, this is usually done by **tapping** holes—cutting threads into a drilled hole using a tool called a **tap**. Tapping allows you to secure fasteners without needing a separate nut, which saves weight and space.
* **Tapping Holes**: Start by drilling with the correct *tap drill size* (e.g., #36 drill for 6-32 threads). Use a tap handle and cutting fluid if possible, turn slowly, and back off frequently to avoid breakage.
* **Threaded Inserts**: If you’re working with 3D-printed parts, threaded inserts (heat-set or press-fit) provide durable threads that won't strip out under torque.
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