>What are some examples of tusk-tenons?
They are most commonly seen in our period on trestle tables (the 15th -
16th century kind, with two supports and a horizontal stretcher, not the
earlier boards-on-tressels kind). You also see them in some timber frames,
and in ironwork (the 14th century iron framework inside the spire of
Salisbury Cathedral uses them!). Yet another common use was to hold wheels
onto axles; the period equivalent of the cotter pin.
They are my second-favorite joint (after drawbored M&T) because they are so
strong, yet easy to knockdown and reassemble multiple times. A pain to
Post-period, they are almost ubiquitous on Arts & Crafts furniture.
I recommend Tom's article!
Furniture and Accessories
For the Medievalist!