mushroom round head bolts carriage bolts 1)Sizes:M5-M20 1/4''-5/8'' Length: 6mm-300mm 2)Standard:DIN, UNC/UNF,BSW,G Products Name: carriage bolts din603 gb12 1)Size:M5-M20 1/4''-5/8'' Length:3/8''-12'' 2)Standard:DIN UNC/UNF BSW JIS ISO 3)Grade:Carbon Steel:4.8 6.8 8.8 10.9 12.9
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