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Connects two 48.3 mm scaffolding tubes coaxially (in a straight line). Uses an M14 hammer‑head bolt and M14 collar nut (wrench sizes 19, 22 or 23 mm). Made from forged S235JR steel and hot-dip galvanized for corrosion protection. Meets EN 74‑1, coupler class B; its official designation is “EN 74‑1 SF B C2 M.” Characteristic load: slipping force = 9.0 kN, bending moment = 1.4 kNm (for class B). Merk: LAYHER Type: JOINT COUPLER Gegalvaniseerd: true