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Heavy-Duty Nylon Insert Lock Nuts for Extreme Conditions. Multi-Standard Compliance: Meets DIN, ASTM, GOST, GB, JIS, ANSI, and BS standards. Global Certifications: Certified with CE, RoHS, GS, and ISO9001 for quality assurance. Durable Material: Constructed from high-grade stainless steel for extreme conditions. Customization Available: Offers customized options for fasteners and machining services. Wide Application: Suitable for construction, machinery, and industrial sectors. Fast Delivery: Sample delivery time ranges from 9 to 26 days. Hexagonal Head Style: Features a standard hexagonal head style for easy installation. Global Export: Exports to global markets with reliable service support.