Black Oxide Hex Flange Bolt

• Material: Carbon steel grade 4.8, 8.8, 10.9, 12.9
• Size: M5~M20
• Standard: DIN6921
• Product description: Black Oxide Hex Flange Bolt is from Fast Hardware Electronic Co., Limited which is a professional black oxide hex flange bolt, black hexagon flange bolt supplier and exporter in china！
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