US carriage bolts in ASTM A307 standard
There are many kinds of American
Carriage bolts, most of which refer to ANSI b18.5. However, some customers in America and other countries will require to produce according to ASTM A307 standard for
Carriage bolts. So what is the application of ASTM A307 standard in
Carriage bolts? What should we pay attention to in production?
In fact, A307 is only a requirement for the strength of screws. Most carriage bolts are in accordance with American Standard ANSI b18.5. Its strength is about between grade 2 and grade 5. There is no need for special treatment. Like most carriage bolts, A307 requires high plasticity and toughness. However, it should be noted that when we produce ASTM A307 American carriage bolts, we must mark the words "A307" in bidding, otherwise the customer has the right to reject it.
Yingfei hardware is a professional coach bolt, corrugated screw manufacturer, with 16 years of fastener industry experience, if you need to pay attention to and contact us.