Genuine Makita 253922-5 — Cup (dished) washer, 12 mm: a precision replacement washer engineered for Makita belt sanders. Made from durable steel with a cupped profile to centre the fastener, spread clamping load and help prevent loosening under heavy vibration, it restores correct fit and reliable fastening in assemblies like covers, guards and tensioning hardware. Fits a wide range of Makita belt sanders (examples: 9401, 9402, 9403, 9404, 9900B, 9903, 9920, 9924 series, M9400/MT940) and is supplied individually for easy service and stocking. Keep genuine Makita power tool parts like this cup-shaped washer on hand to minimize downtime and maintain smooth sanding performance.