Can a carriage bolt be supplied to the A325 specification?
Technically, carriage bolts cannot be manufactured to the A325 specification. The A325 specification in section 1.1 states, “This specification covers two types of quench and tempered steel heavy hex structural bolts.” Section 1.5 states, “This specification is applicable to heavy hex structural bolts only. For bolts with other configurations and thread lengths with similar mechanical properties see A449”.
Therefore, to order carriage bolts with A325 chemical and mechanical properties, you would order to the ASTM A449 specification. The ASTM A449 and A325 specifications share virtually identical chemical and mechanical requirements.
Looking for Carriage bolt, 5/16-18, partially threaded, smooth shank of 2-1/2″. If you don’t, who should?
@Charles- Apologies, but we are not sure where to send you on something like this.
Can I get the following bolt?
5000 each – Carriage Head, Ribbed shoulder, 1/2″- 13 x 1″ LONG, Galv. Steel
@Denis- Thank you for your inquiry, but this is not a good item for us.
Both plow bolts and carriage head bolts offer advantages in certain applications; the smooth head doesn’t catch on material. The square neck requires a square hole or a soft material (but not too soft).
Can either be made with a cap socket?
I guess flat head cap socket bolts are an option but that requires 2 drilling operations.
@Jim- We do not have the tooling to manufacture that part. It is possible that we could have the tooling made if your quantity and lead time allow, but we would need to see more specific drawings in order to evaluate.
can you manufacture the 7/8-9 UNC carriage bolt without the square shank?
@James – Yes we can, we’d call that a round head bolt.
can we use grade 8.8 bolts in place of A325
@Shrenik – Not without an engineer’s approval. We have an FAQ regarding substituting SAE grade 5 bolts for A325s, the same arguments would apply for metric grade 8.8 bolts as well. Here is a link to the FAQ. https://www.portlandbolt.com/technical/faqs/astm-a325-vs-grade-5-bolts/