SAE J476_201302

1. Scope
2. References
3. Truncation Dryseal American Standard External
   and Internal Pipe Threads
4. Dryseal American Standard Pipe Thread (NPTF)
5. Dryseal SAE Short External Taper Pipe Thread
   (PTF - SAE Short External)
6. Dryseal SAE Short Internal Taper Pipe Thread
   (PTF - SAE Short Internal)
7. Dryseal American Standard Fuel Internal Straight
   Pipe Thread (NPSF)
8. Dryseal American Intermediate Internal Straight
   Pipe Thread (NPSI)
Appendix A - Supplementary Thread Information
Appendix B - Chaser and Tap Information
Appendix C - Dryseal Pipe Thread Gaging
Appendix D - Special and Fine Dryseal Pipe Threads
Appendix E - Superseded Gage Dimensions and Gaging
             Practice for 1/8 and 1/4 Size Dryseal Pipe Threads

The Dryseal American Standard Taper Pipe Thread, the Dryseal American Fuel Internal Straight Pipe Thread and the Dryseal American Intermediate Internal Straight Pipe Thread covered by this standard conform with the American Standard ASA-B2.2. The Dryseal SAE-Short Taper Pipe Thread in this standard conforms with the Dryseal American Standard Taper Pipe Thread except for the length of thread, which is shortened for increased clearance and economy of material.The significant feature of the Dryseal thread is controlled truncation at the crest and root to assure metal to metal contact coincident with or prior to flank contact. Contact at the crest and root prevents spiral leakage and insures pressure-tight joints without the use of a lubricant or sealer.Lubricants, if not functionally objectionable, may be used to minimize the possibility of galling in assembly.