The us Carriage bolt, also called round head,pan head,cap head or mushroom head square neck bolts in inch, the commonly used standrads are ASTM 307A,Infly Fasteners Inc is a manufacturers and factory of astm a307 us Carriage Bolt in inch, to supply to Mushroom head square neck bolt in inch and Round head square neck bolt in china, we are according to ASTM 307A and ANSI B18.5.
About ASTM A307 US Carriage bolts, we can do:
Size: diameter:1/4"-5/8", Length: 3/4"-10"
Material: Carbon steel grade 2, Q195, 1008
Surface: Self, colour, White zinc, Blue zinc, Yellow Zinc, Black, Hot dip galvanizing
Packing: bulk about 20KG-25KG carton and then on pallet.
Contact: Mr.Lufel Lee
Add: No.333 Xinqiao Road, Haiyan, Jiaxing City, ZJ China.