Library › Hardware › Leaf hub collars: Ø12 and Ø18 bore, M3 grub

collar Ø20 × 5, Ø12 bore, M3 tapped radial hole (Ø2.5)

collar Ø20 × 5, Ø12 bore, M3 tapped radial hole (Ø2.5): clamps leaf B's hub on the displacer rod against the cap's boss

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

STEP STL free, CC BY 4.0 (credit "Xem Studio")

Dimensions

collar	displacer
od_mm	20
bore_mm	12
h_mm	5

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From the full sheet

Leaf hub collars: Ø12 and Ø18 bore, M3 grub: every size, notes, mating features and sources. How is a flexure leaf's hub held on its rod?

Other sizes

collar Ø28 × 5, Ø18 bore, M3 tapped radial hole (Ø2.5)