All parts in their assembled position (each part its own solid)

Exact dimensions. True size, no printing tolerance added. Threads are plain cylinders at the major diameter.

STEP STL free, Xem Studio Design License — Xem Studio

Dimensions

dimension	parts
value	post, rail, wedge

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From the full sheet

Tusk tenon joint (knock-down wedged tenon): every size, notes, mating features and sources. How does a tusk tenon work?

Other sizes

Through-mortised member
Rail with a long through tenon and a tapered wedge slot
Tapered wedge (1