Transcription of Fastener Handout - CAE Users
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Fastener Handout - CAE Users
Fastener Handout Introduction: Engineering Design Representation 2 Threads 2 Effect of thread angle on strength: 3 Standardization of Threads: 4 Descriptions of the Thread Series: 4 Class fit: 5 Specification of SAE/Metric Threads: 6 Local Notes (callouts) 8 Counterbore specification: 9 Countersink specification: 9 Writing notes for threaded holes: 10 Threaded Mechanical Fasteners 13 Examples of threaded hole notes 13 Clamping Force: 14 Cap Screws: 14 Machine Screws: 15 Set Screws: 15 Examples of Fastener specifications 16 Appendix A Fastener Head Dimension Tables 21 Appendix B Recommended Fastener Torques 28 Appendix C Bolt Grade Markings and Strength Chart 29 Appendix D Letter and Number Decimal Equivalents 31 2 Introduction: Engineering Design Representation Despite advances, 2D mechanical drawings are still the most popular format for design documentation.
5 Descriptions of the Thread Series: Unified Coarse.UNC is the most commonly used thread on general-purpose fasteners. Coarse threads are deeper than fine threads and are easier to assemble
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