Rod ends (heim joints) M3 to M8 — dimension sheet Source: Xem Studio, https://xemstudio.com/objects/rod-ends-heim-joints/ (CC BY 4.0) Basis: POS-series male rod-end envelopes: ball Ø 2 × M, head OD ball + 4, head thickness 0.8 × ball Catalog version: 2026-10-20 Sizes: see table below - Envelope of a male rod end: a ball with a bore of the thread size, held in a head of OD ball + 4 and thickness 0.8 × ball, on a threaded shank drawn at the thread major Ø. - Ball Ø: M3 6, M4 8, M5 10, M6 12, M8 16. Ball centre to shank end: 20, 24, 28, 32 and 42 mm. - The ball's bore is the thread Ø (3–8) and takes a bolt of that size; ±13° of misalignment is the catalogue figure for this series. file thread ball bore ball Ø head OD × thickness centre to shank end rod-end-m3 M3 3 6 10 × 4.8 20 rod-end-m4 M4 4 8 12 × 6.4 24 rod-end-m5 M5 5 10 14 × 8 28 rod-end-m6 M6 6 12 16 × 9.6 32 rod-end-m8 M8 8 16 20 × 12.8 42 Files elsewhere (not hosted by Xem Studio; license as stated by the publisher): - Wikipedia: Clevis fastener — web — CC BY-SA 4.0 (text) — https://en.wikipedia.org/wiki/Clevis_fastener - Wikipedia: Universal joint — web — CC BY-SA 4.0 (text) — https://en.wikipedia.org/wiki/Universal_joint - Wikipedia: Rod end bearing — web — CC BY-SA 4.0 (text) — https://en.wikipedia.org/wiki/Rod_end_bearing - McMaster-Carr: Clevis pins (free STEP per part, for your own design use; no redistribution) — STEP, PDF — McMaster-Carr site terms [verify license at link] — https://www.mcmaster.com/products/clevis-pins/ - McMaster-Carr: Rod ends (free STEP per part, for your own design use; no redistribution) — STEP, PDF — McMaster-Carr site terms [verify license at link] — https://www.mcmaster.com/products/ball-joint-rod-ends/ - Long Earth Society: Engine and rig builds — web, video — LES site — https://longearthsociety.com/engineering/ Free files (CC BY 4.0, Xem Studio; STEP + STL, 5 parts): https://xemstudio.com/files/hardware/rod-ends-heim-joints/index.json API: https://xemstudio.com/api/geometry?object=rod-ends-heim-joints