The Brompton hinge clamp assembly consists of two parts, a metal hinge clamp plate which presses against the frame / handlebar stem to stop unfolding, and a screw - which screws into the frame, and is used on both the main frame assembly and the handlebar stem.

When done up it stops the handlebar stem / main frame from folding.

One of the essential Brompton spare parts - as without this your Brompton won't function properly!

Brompton Q part code: QHCA
Brompton part number: 9040025

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