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A. It is a 4.0mm pitch metric roller set for the Silbertool 01441100 external thread reformer.
A. They re-form M30–M110 external threads with a 4.0mm pitch.
A. Heavy engineering and vehicle repair shops restoring large coarse metric threads.
A. It is explicitly described as a 4.0mm metric roller set for that range.
A. The tool provides correct contact geometry and force distribution for those rollers.
A. Cold-formed threads retain core material and can be stronger and smoother than newly cut ones.
A. Wrong pitch rollers may jam or further deform damaged threads instead of repairing them.
A. It fills the 4.0mm pitch requirement, adding to the reformer’s coverage of multiple thread types.
A. In labelled protective cases, away from moisture and impact damage.
A. Large structural and engineering fasteners often use coarse 4mm pitch in the M30–M110 range."
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