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The HKS SUS spring washer M6 is listed as a replacement tension washer for M6 fastener applications. The source identifies it for service use to help maintain bolt preload and resist loosening in assembled components. Supplied as a direct-replacement hardware item, it’s intended for technicians and DIYers restoring or maintaining assemblies where a correctly sized spring washer is required.
HKS SUS Spring Washer M6
