Genuine DeWalt spring — part number 942912-00 — replacement spring for plunge-router support/lock assemblies. It’s a small metal compression spring that provides the tension under the lock/stop assembly so the plunge base and fine-adjust / stop engage and release correctly.

Fits a range of DeWalt plunge routers (example models: DW624, DW625E Type 4, DWE625, DW629, DW626)

Quick to replace — the spring sits into the support under the lock/button and is reinstalled by sliding it onto the stop bolt, then returning the lock and nut; the job typically takes minutes and an adjustable wrench is handy for removing the nut on the stop bolt. This is a genuine DeWalt part, listed in the official parts breakdown for the DW625 / DW626 .