Preparing Parts Before Plating: A Guide for Fastener Makers (OEM)

Oil, swarf, rust or forming residues directly affect how well the coating adheres.

We run a cleaning stage, but parts that arrive in good condition give a more uniform result.

• Material grade (e.g. S45C, SCM435) and current condition.
• The process wanted and target values (HRC, thickness in µm, colour, salt-spray hours).
• Tolerances/features to watch—threads or holes that must not bind.
• Quantity/weight and due date.

Tight-tolerance hardened parts should allow stock for distortion/grinding.

Fine threads that might bind: flag them so we control coating thickness.

Send a first article before full production to confirm the result before the big lot runs.