Common references in enquiries
| Reference | Enquiry context |
|---|---|
| DIN 933 / ISO 4017 | Common hex-head full-thread product references; verify the exact requirements |
| DIN 931 / ISO 4014 | Common hex-head bolt references; confirm thread and dimensional requirements |
| DIN 934 | Hex nut enquiries; identify applicable grade and project revision |
| DIN 125 | Flat washer enquiries; include dimensions and material requirements |
| ASTM F3125 | Structural bolt / assembly specification; state grade and type |
| ISO 898-1 | Mechanical properties for certain carbon/alloy steel bolts, screws and studs |
No automatic equivalence
Similar product descriptions do not prove interchangeability. Confirm any alternative against the drawing and governing project specification.
Use official source documents
Refer to the official ISO 898-1 page, ISO 4017 reference and ASTM F3125/F3125M page. Select the revision required by the project, not simply the newest listing.
These summaries are not copies of the standards or engineering approvals.
Request a QuoteStandard-specific purchasing guides
Follow the project-required edition, then prepare the complete product and assembly brief.