Decision Notes
What to confirm first.
- Confirm the required standard before comparing prices.
- Check thread length, grade, material, and finish together.
- State whether equivalent standards are acceptable in the RFQ.
Buyer Guide
DIN 933 and ISO 4017 are both common hex bolt standards, but buyers should not treat them as interchangeable without checking drawing requirements, thread length, material, grade, finish, and application environment.
For export procurement, the safest RFQ should include the required standard, size, grade, material, surface finish, quantity, packing method, destination market, and any certificate or inspection requirements.
If a drawing references one standard but the project can accept an equivalent, state that clearly in the RFQ. This helps suppliers quote the right item instead of guessing from a generic bolt description.
FAQ
Questions buyers usually ask next.
Are DIN 933 and ISO 4017 always interchangeable?
No. They may be close in many procurement contexts, but buyers should confirm the drawing, thread length, tolerance, grade, material, and finish before accepting substitution.
What should buyers include in a hex bolt RFQ?
Include standard, size, grade, material, finish, quantity, application, packing requirements, certificates, and whether equivalent standards are acceptable.