Galvanized carriage screw M10-M20 semi-round head square neck screw large flat head bridge shelf bolt carriage bolt

 
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material:
carbon steel
Color Classification:
M10*16 (5 pcs) M10*20 (5 pcs) M10*25 (5 pcs) M10*30 (5 pcs) M10*35 (5 pcs) M10*40 (5 pcs)
product strength:
4 8 grades
head shape:
round
standard type:
National standard
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