narrow end of a tube which fits into the mortise of the stock or of another tube

Capfa - Bulgarian

Čep - Czech

Espiga - Spanish (Castilian)

Espigo - Portuguese

Espigu - Bable (Asturian)

Grlo - Macedonian

Jiǎo (Shēng jiǎo / Shēngjiǎo) - Chinese

Kulak - Croatian

Mèccia - Italian (Sicilian)

Père - Italian (dialect)

Tenon - English

Tenon - French

Zapfen - German