Need Anti-Loosening Washers That Meet JIS Standards for High-Vibration Automotive Applications?

Our M8 internal serrate washers are manufactured to JIS B 1255 specifications with black zinc plating for enhanced corrosion resistance. Each washer undergoes ISO-compliant inspection using 2.5D projectors and calipers to verify all critical dimensions. With 45 years of fastener expertise and laser-cutting precision, we deliver consistent quality for your automotive assembly lines. Contact us for samples and technical specifications tailored to your vibration-resistant fastening requirements.

All inspection processes utilize precision measurement tools including calipers and 2.5D projectors to verify critical dimensions including washer diameter, washer height, and inside diameter. With 45 years of fastener manufacturing expertise and a commitment to quality assurance, every internal serrate washer is inspected during the production process and before shipping to ensure it meets stringent international standards. Our comprehensive manufacturing capabilities and salt spray testing protocols guarantee reliable performance in demanding industrial applications requiring secure fastening solutions.