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Grade8.8 Carbon Steel DIN931 M8 to M36 Black Partial Thread Hex Bolt. Factory Direct Supply: Genuine fastener factory in Yongnian with no middleman markup. Flexible MOQ Options: MOQ 1 piece for stock items; 2 tons for custom production. Customizable Specifications: Customizable diameter (M8-M36), length (10-500mm), and thread type. Fast Delivery Time: Custom orders delivered in 7-15 days; split shipment supported. CE Certified Products: Grades 4.8/8.8/10.9/12.9 available with CE certification. Free Sample Supply: Free samples provided for customers who confirm orders. Eco-Friendly Coatings: Supports Cr6+/Cr3+ and RoHS compliance with customizable salt spray hours.