Genuine Makita Spiro Lock Washer 30 — part no. 257932-4
Replace the locking washer that secures the drive/flange stack in a range of Makita rotary and combination hammers. This is the genuine Makita spiro-style lock washer listed as "Spiro Lock Washer 30" (part 257932-4); it’s the 30 mm lock washer used alongside the flat washer and driving flange in the tool’s hammer/drive assembly.
What it is and why it matters:
- Spiro-style lock washer, nominal 30 mm size, designed to hold the flat washer / driving flange stack and resist rotational loosening under hammering loads. It’s supplied as a single piece (qty 1 in parts diagrams).
Example models this part fits (representative list):
- HR2630, HR2631
- HR2600, HR2601
- HR2650 / HR2651
- DHR242 / DHR243 / DHR280 / DHR281 (cordless rotary hammers)
- BHR242 / BHR243 (corded/combination hammers)
- M8701
Notes:
- Sold as the original Makita part to match the factory fit and function; refer to your tool’s parts diagram to confirm item position and quantity before installation.
If you need the exact replacement for a specific model, this genuine Makita 257932-4 is the part called out in Makita parts breakdowns for the models listed above.
Jump straight to the Makita spare parts diagrams:
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