Ningbo Steel Bolt Co., Ltd

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DIN960-961 Class 4.8 and 6.8 and 8.8 and 10.9 and 12.9 Hex Cap Screw (Fine Thread)	DIN931-933 Class 4.8 and 6.8 and 8.8 and 10.9 and 12.9 Hexagon Head Bolts	ASTM A307 Grade A Hex Bolts	SAE J429 Grade 2 and 5 and 8 Hex Cap Screws
ISO4014-4017 Class 4.8 and 6.8 and 8.8 and 10.9 and 12.9 Hexagon Head Bolts