ASTM A563/A563M — Structural nuts
Nuts for structural and mechanical enquiries, including Grade DH where specified by the project.
- Reference
- ASTM A563/A563M — 26
- Configuration
- To specification and drawing
- Dimensions
- Specify units and tolerances
- Supply
- Confirm feasibility and documents
Technical drawing and dimensions to specify
Family selection guide. The drawing only identifies dimensions to specify; it does not identify a certified item, an available size range or a complete assembly. Final geometry and dimensions must match the approved drawing.
Dimensional data for the request
| Symbol | Required information | Units |
|---|---|---|
| d | Nominal thread and pitch | mm or inches, specify |
| s | Width across flats | mm or inches, specify |
| m | Nut height | mm or inches, specify |
Attach the dimensional standard or drawing, tolerances, quantity and configuration. Mechanical properties and grades appear below; they are not geometric dimensions.
Materials, grades and technical requirements
Nuts for structural bolting
A563 covers carbon and alloy steel nuts. Grade and Hex / Heavy Hex geometry are separate characteristics. Select nuts alongside the bolt, considering diameter, finish and proof load.
How to identify the nut
| Field | What to specify |
|---|---|
| Grade | C / DH / DH3 or another specified grade |
| Type / material | Grade-specific steel; DH3 for applicable weathering applications |
| Filetto / Thread | UNC / 8UN / specified metric series |
| Geometry | Hex / Heavy Hex |
| Finish | Plain or coated, with verified thread fit |
Any use of A194 2H instead of A563 DH must be checked against the applicable specification and project requirements. Do not extend this option to all grades or combinations.
Grade DH
Identify grade, geometry, thread and finish. The mating nut is confirmed within the documented configuration, not merely by matching the bolt diameter.
Technical documentation
Dueemme technical sheet
Download technical PDF ↓Assembly and traceability
Lot, markings, component list and conformity documents relevant to the supply.
EN 10204 3.1 · DoP · CoC
State the required documents. Applicability and availability are confirmed during enquiry review.
Testing and coatings
Dimensional reports, mechanical tests, coating reports and ROCAP where applicable to the specification.
Application sectors
Industrial and EPC projects, according to the specified application.
Dueemme industries →Have a structural or ASTM specification?
Build your enquiry. In the next step, add your contact details and attach the specification, bill of materials or drawing.