Metallic Connections for Fluid Power and General Use - Part 1: 37 Degree Flared Fittings
This part of SAE J514 covers general and dimensional specifications for 37 degree flared tube fittings. Also included are 37 degree flared fittings with NPTF pipe threads in Appendix B. These fittings are intended for general application in hydraulic systems on industrial equipment and commercial products.
These fittings are capable of providing leak-proof, full flow connections in hydraulic systems operating at working pressures as specified in Table 6. Since many factors influence the pressure at which a hydraulic system will or will not perform satisfactorily, the values shown in Table 6 should not be construed as a guaranteed minimum.
For any application, it is recommended that sufficient testing be conducted and reviewed by both the user and fitting manufacturer to assure that performance levels will be safe and satisfactory.
Rewrite of SAE J514 to harmonize with ISO 8434-2 where applicable, and properly organize similar adapters into individual parts. 37 degree connectors with ISO 6149-3 stud ends are specified in ISO 8434-2 and are not included in this revision of SAE J514.
In an effort to standardize within a global market and ensure that companies can remain competitive in an international market, it is the intent to convert to metric hex sizes, which will:
Lead to one global system.
Guide users to preferred system.
Performance requriements have been revised to remove ambiguity.
Internal and external hex O-ring plugs were removed from SAE J514. These plugs are now specified in SAE J1926-4.
Straight thread O-Ring ports, formerly part of SAE J514, are specified in SAE J1926-1.
The seat diameter d28 in Figure 15 was brought in line with diameter d24 for like parts.
Minimum stock sizes for female pipe listed in Table A9 have been revised due to a contradiction between the listed minimums and the stock sizes specified for adapter unions, which will now appear in SAE J514/3.
37 degree fittings with NPTF pipe threads, formerly part of SAE J514, are now attached as Appendix B.
All dimensions are given in SI units. Except for nominal sizes, and thread designations, U.S. customary units have been eliminated from this standard.
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Fluid power systems
Industrial vehicles and equipment
Also known as: SAE J 514/1
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