Bolted Joint
Margin of Safety
in Minutes.
Fast, reliable margin of safety calculations for bolted joints — generate certification-ready reports in minutes instead of hours.
From bolt selection to certified report.
Real interface, real calculation, real PDF export — watch a full margin-of-safety verification run in under a minute.
Still using spreadsheets for bolted joint calculations?
With a spreadsheet, the calculation itself might only take a few minutes — it's writing up the justification report afterward that eats your afternoon.
BoltCore calculates every margin instantly and generates the certification-ready report in the same click — no separate write-up, no formatting.
Built by a senior mechanical engineer specializing in bolted joint justification for aerospace and cryogenic structures — the same ECSS-E-ST-32-19C rigor applied here to critical assemblies across aerospace, defense, energy, and industry.
Aurélien Dasquié LinkedIn
Engineering-grade
bolted joint analysis.
Preload & tightening torque
Klein-Kellermann formula with full scatter. MA_min/max with method-specific ε.
Advanced analytical methodology
Full compliance model: δb/δc, loading plane factor Φ, cone model.
Thermal preload variation
CTE-based ΔFv for T_min/T_max conditions with full CTE mismatch analysis.
11 safety margins
Yield & ultimate rupture, separation, sliding, thread stripping, washer & flange bearing.
Dynamic assembly schema
Real-time SVG cross-section with washers, multi-plate stacks, load arrows.
PDF engineering report
Official justification document ready for design review or certification audit.
Simple, transparent pricing.
Start for free. Upgrade when your projects demand the full power of BoltCore.
Discover BoltCore. No account required. Ideal for learning the methodology.
Try for Free →Full access for individual engineers. Everything for professional verification.
For teams and organisations needing full traceability and collaboration.
Contact us →Full feature comparison
Detailed breakdown of each plan.
| Feature | Free | Pro | Enterprise |
|---|---|---|---|
| Bolt Configuration | |||
| Diameters | M6/M8 | ✓ | ✓ |
| Resistance classes | 8.8/10.9 | ✓ | ✓ |
| Stainless A2/A4 | ✗ | ✓ | ✓ |
| Custom bolt geometry | ✗ | ✓ | ✓ |
| Tightening Parameters | |||
| Torque + Fv | ✓ | ✓ | ✓ |
| Custom µ coefficients | ✗ | ✓ | ✓ |
| Scatter ε / Mp / FZ | Fixed | ✓ | ✓ |
| Safety Margins | |||
| Tightening (Von Mises) | ✓ | ✓ | ✓ |
| Bolt rupture yield & ult. | ✗ | ✓ | ✓ |
| Separation / sliding | ✗ | ✓ | ✓ |
| Thread stripping | ✗ | ✓ | ✓ |
| Flange & washer bearing | ✗ | ✓ | ✓ |
| Assembly & Loads | |||
| Multi-plate stacks | 2 plates | ✓ | ✓ |
| Material library | ✗ | ✓ | ✓ |
| Thermal (CTE mismatch) | ✗ | ✓ | ✓ |
| FA / FQ external loads | ✗ | ✓ | ✓ |
| Export & Reporting | |||
| Assembly schema (SVG) | ✓ | ✓ | ✓ |
| PDF engineering report | ✗ | ✓ | ✓ |
| Branded PDF (logo) | ✗ | ✗ | ✓ |
| API access | ✗ | ✗ | ✓ |
Built around critical
engineering standards.
BoltCore implements an advanced analytical methodology rooted in ECSS — the European space standard for bolted joint verification — bringing aerospace-grade rigor to critical assemblies across aerospace, defense, energy, and industry.
Compliance model, thermal analysis, loading plane factor, thread stripping analysis, and bearing margin calculations are all integrated into a unified, traceable workflow designed for critical assemblies — wherever failure is not an option.
Engineering precision.
Advanced engineering methodology.
Start for free today. No account needed. Upgrade when your projects demand it.