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ECSS-E-HB-32-23A

Contents

1 Scope
2 References
3 Terms, definitions and abbreviated terms
4 How to use the guidelines
5 General Fastener Analysis Guidelines
6 The Preload
7 Concentric Axially Loaded Joints
8 Eccentric Axially Loaded Joints
9 Shear Loaded Joints
10 Low Duty Joints
11 Fatigue and Fracture Control of Fasteners
12 Preloaded Fastener Installation
13 Corrosion
14 Lubricants for Space Use
15 Manufacturing Quality Control
16 Joint Validation by Testing

Standards ECSS ECSS-E-HB-32-23A6 The Preload

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6The Preload

ECSS-E-HB-32-23A, Space Engineering — Threaded Fasteners Handbook

Last Updated 29 Oct 2026

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6.1 Overview
6.2 Coefficient of Utilisation
6.3 Theoretical Aspects
6.4 Mechanisms of Preload Loss
6.5 Margin of Safety on Tightening
6.6 Worked Example
6.7 References