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T-slot tongue gauge

T-slot tongue gauge: 5.6 / 5.8 / 6.0 mm tongues for a 6 mm slot

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

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From the full sheet

T-slot tongue gauge 5.6 / 5.8 / 6.0 mm (6 mm slot): every size, notes, mating features and sources. What tongue width slides in a 2020 extrusion slot when 3D printed?