Free construction field utility

Bolt Tightening Sequence Generator

Enter the bolt count to generate a star or crisscross pattern and, when needed, a staged 30/60/100% pass reference.

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Number of bolts

Even numbers only (4–64) — rounds automatically.

Common counts

Tightening order

Number your bolts 1–8 clockwise starting from the top. Tighten in this order: 1 → 5 → 2 → 6 → 3 → 7 → 4 → 8

Target final torqueoptional

Unit

Need to work out the target torque from a bolt tension first? Use the Tension/Torque Calculator.

How to use it

Enter the flange bolt count.
Add a target torque only when an approved procedure supplies it.
Issue the sequence with the applicable bolting procedure and inspection record.

Field-use boundary

This shows one common sequence. Company procedures and project specifications may define a different pattern, pass count, lubricant basis, or acceptance method. Follow the approved bolting procedure.

Keep the record

Keep the input, responsible-person review, project document revision, and issued output together in the controlled project file.

Related working references

Bolt Torque and Proof Load Reference Tolerance and Fit-Up Reference

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