4" LOCK NUT, GA4530K

Ensure safe, slip-free wheel clamping on your compact grinder with the genuine Makita 224501-6 Lock Nut. Precision-engineered for Makita 4" angle grinders—including model GA4530K and 9553NB/9554NB series—this genuine OEM lock nut features standard M10 x 1.25 metric threading to securely fasten grinding wheels, abrasive cutoff discs, and wire cups to the arbor spindle. Forged from high-grade alloy steel and finished with a protective black oxide coating to resist heat, friction, and jobsite corrosion, it withstands high rotational forces without thread stripping. Dual pin spanner holes provide a precise fit for standard Makita lock nut pin wrenches for fast, effortless accessory swaps.

Key Features:

• Genuine Makita Replacement: Factory-spec outer lock nut ensures proper disc tension and vibration-free spin balance.

• Thread Specification: Machined with exact M10 x 1.25 threads for 10 mm metric spindle shafts.

• 4-Inch Disc Compatibility: Clamps 4" (100 mm) grinding wheels, cutting discs, and abrasive accessories securely.

• Tough Alloy Steel Build: Heat-treated steel construction resists warping, cross-threading, and extreme spindle torque.

• Corrosion-Resistant Coating: Black oxide protective surface treatment shields against rust, sparks, and workshop debris.

• Pin Spanner Holes: Compatible with standard 4" Makita angle grinder pin wrenches for quick blade changes.

• Specifications: Part Number: 224501-6 | UPC: 088381112444 | SKU: MK 224501-6 | Thread Size: M10 x 1.25 | Diameter Compatibility: 4" (100 mm) | Material: Heat-Treated Carbon Steel