Original Makita pan‑head screw — part no. 911139-3 — pan head, thread M4 × 20 mm (WG finish), specified by Makita for use where a short, flush-seating fastener is required.
This genuine Makita fastener is shown in Makita parts diagrams securing the safety cover and nearby spool / guard assemblies on the DUR181 cordless trimmer , also for BUR141 / BUR181 parts Lis as well — useful examples of compatible trimmer models.
If you need a direct replacement to restore factory fit and alignment for those covers or spool mounts, this M4 × 20 mm pan‑head screw matches the original specification and finish called out by Makita.
Small, exact, and ready to slip into your toolbox as a reliable power tool parts replacement for Makita trimmers in the DUR / BUR 141 and 181
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