Engineering Design Representation
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 Metric Threads: 6. Local Notes (callouts) 8. Counterbore specification: 9. Countersink specification: 9. Writing notes for threaded holes: 10. Threaded Mechanical Fasteners 13. Clamping Force: 14. Cap Screws: 14. Machine Screws: 15. Set Screws: 15. Appendix A Fastener Head Dimension Tables 21. Appendix B Recommended Fastener Torques 28. Appendix C Bolt Grade Markings and Strength Chart 29.
Drawing texts and Machine Design handbooks. Thread form: Thread form is a classification based upon the cross-sectional profile of the thread. The standard thread form for inch unit threads in U.S. is the Unified (UN) thread form. This thread form is characterized by a 60 degree thread angle and a flat crest and rounded root. Thread series:
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