BUTTRESS INCH SCREW THREADS, 7 DEGREES/45 DEGREES FORM WITH 0.6 PITCH BASIC HEIGHT OF THREAD ENGAGEMENT
American Society of Mechanical Engineers
1. Scope<br>2. Definitions<br>3. Form of thread<br>4. Symbols and Formulas<br>5. Preferred Diameter-Pitch Combinations<br>6. Tolerances<br>7. Allowance for Easy Assembly<br>8. Example Showing Dimensions for a Typical<br> Buttress Thread (2 inch Diameter, 4 TPI, <br> 7 degrees/45 degrees Flank Angles, class 2)<br>9. Thread Designations<br>10. Measurement of Buttress Thread Gages and <br> Product<br>11. Recommended Gaging Practice<br>12. Dimensional Acceptability of Buttress <br> Product Screw Threads<br>Appendix A - Pitch Diameter Equivalents for Lead<br> and Flank Angle Deviations<br>Appendix B - Pitch Diameter Measurement<br>Appendix C - Notes on Corresponding British Standards<br>Appendix D - Buttress Screw Thread Designations Used <br> in Old ASA B1.9-1953 Standard
Pertains to screw threads of buttress form and provides a form of 7 degrees/45 degrees buttress thread with 0.6p basic height of thread engagement.
| Document Type | Standard |
| Status | Current |
| Publisher | American Society of Mechanical Engineers |
| ProductNote | Reconfirmed 2007 |
