This SAE Standard covers complete general and dimensional specifications for tube fittings of the spherical and flanged sleeve compression types for use in the piping of air brake systems on automotive vehicles. The spherical sleeve compression type Figures 1A to 5 and Tables 1 to 3 is intended for use with annealed copper alloy tubing per SAE J1149, Type 1. The flanged sleeve compression type Figures 6A to 11 and Tables 4 to 6 is intended for use with nylon tubing per SAE J844. It is not intended to restrict or preclude other designs of a tube fitting for use with SAE J844, air brake tubing. Performance requirements for SAE J844 are covered in SAE J1131. See SAE J1131 for the Performance Requirements of Reusable (Push to Connect) Fittings Intended for Use in Automotive Air Brake Systems.
CAUTION: To assure satisfactory performance, tapered sleeve compression type fitting components (SAE J512) should not be intermixed with the spherical or flanged sleeve components, nor should the spherical sleeve compression type components be intermixed with the flanged sleeve compression type components when assembling connection in areas where the three types are available.
SAE J246 document is in need of a periodic review.
Changes in material and construction of nylon tubing per SAE J844 have impacted performance of the flanged sleeve fittings covered by this standard. Alternate construction dimensions per Figure 10B have been added for 3/8 and 1/2 size sleeves. The optional notation was removed from figure 10B.
Pipe thread turn lengths and tap drill depths (P & P1) were changed to reference dimensions and figures (1, 2, & 3) updated to correctly reflect the P1 dimension.
Pipe ID drill diameter (D1) updated to a maximum based on drill diameters specified by SAE J530. Changed existing S1 dimension (Figure 3C & 3D) to S2 and added new S1 (Figure 1A) and S3 (Figure 3C & 3D) to control depth of D1 dimension when it is greater than D dimension. Added footnote f to table to make use of larger D1 counter bore up to manufacturer’s option.
Added recommended assembly instructions for the products defined by this standard.