Genuine Makita 251867-1 — clamp/ thumb screw M5 x 30 mm (M5 thread, 30 mm shaft) designed to replace the hand-tightening screw used on several Makita plunge-saw and trimming assemblies.
This part is listed as the clamp/knob or thumb screw for models such as SP6000 and 3700B / 3702B / 3701, among other related Makita tool types.
It functions as the fastening screw that secures the stopper block / blade-case / depth-guide assemblies (hand-tightenable head for quick adjustments), so you’ll get the correct fit and engagement without modifying the tool.
Listed and sold as a genuine Makita clamp knob / thumb screw, this small replacement is a common entry in Makita parts inventories and a straightforward swap when the original is lost or damaged.
If you need a direct, metric-specified replacement — M5 × 30 mm, thumb/wing-style head — this 251867-1 restores proper clamping and adjustment in the affected assemblies and is compatible with typical power tool parts layouts.
Jump straight to the Makita spare parts diagrams:
