Product and application brief
Heavy hex structural bolts are specified as part of a structural connection, with the bolt, nut, washers, coating and verification requirements considered together.
For steel-connection enquiries, send the approved connection specification or bill of materials. A heavy hex head alone does not establish the required structural grade or assembly compliance.
Specification checklist for quotation
The table defines the information to send, not a guaranteed stock range or a substitute for an approved technical specification.
| Requirement | What to specify |
|---|---|
| Assembly reference | Governing standard and project-required revision; ASTM F3125 Grade A325 or A490 where specified |
| Dimensions | Diameter, length, thread length and required unit system |
| Matching components | Nut grade, washer type and quantities per bolt |
| Finish | Permitted finish and any thread-fit requirements |
| Verification | Required mechanical tests, lot traceability and reports |
| Order | Number of complete sets, packing and destination |
Selection and compatibility
Choose this range for a specified heavy hex structural connection. Use the tension-control range when the project calls for a twist-off assembly, not as an automatic substitute.
Do not replace a specified structural assembly with a general-purpose bolt merely because diameter or nominal strength appears similar. Installation requirements and permitted coating processes must be confirmed for the approved assembly.
Prepare the order brief
Send a controlled drawing or complete product reference, plus quantities by size. Identify the inspection reports, packaging and shipping requirements needed for your order. If a requirement is not settled, mark it as needing confirmation rather than assuming a substitute.
Read the structural bolts enquiry checklist before submitting your parts list.
Can I order bolts without matching nuts and washers?
Yes, you may enquire about individual components, but identify the complete connection specification so compatibility and the quotation scope can be confirmed.
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Technical reference
Use the governing structural assembly specification and the project-required revision; this page does not reproduce a standard.