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	block, nut

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From the full sheet

M8 nut trap (hex pocket for an ISO 4032 nut): every size, notes, mating features and sources. What size is an M8 nut trap?

Other sizes

Block with a 13 mm hex pocket, 6.8 mm deep, and a Ø8 screw hole
M8 hex nut, 13 AF × 6.8