SAE_J_1231-2004

SURFACE VEHICLE STANDARD Formed Tube Ends for Hose Connections and Hose Fittings SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefrom, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. Copyright © 2004 SAE International All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: 724-776-4970 (outside USA) Fax: 724-776-0790 Email: custsvc@sae.org SAE WEB ADDRESS: http://www.sae.org Issued 1978-05 Revised 2004-08 Superseding J1231 JAN2001 ® J1231 REV. AUG2004 1. Scope This SAE standard provides general and dimensional specifications for formed tube ends and hose fittings. These connections are intended for general applications in low pressure automotive and hydraulic systems on automotive, industrial, and commercial products. The fittings shown in Figures 2 and 3 are intended to be retained by hose clamps as specified in SAE J1508. It is recommended that where step sizes or additional types of fittings are required, they be designed to conform with the specifications of this document insofar as they may apply. The following general specifications shall supplement the dimensional data contained in the tables with respect to all unspecified detail. 2. References 2.1 Applicable Publications The following publications form a part of this specification to the extent specified herein. The latest issue of SAE publications shall apply. 2.1.1 SAE PUBLICATIONS Available from SAE, 400 Commonwealth Drive, Warrendale, PA 150960001. SAE J475—Screw Threads SAE J476—Dryseal Pipe Threads SAE J512—Automotive Tube Fittings SAE J514—Hydraulic Tube Fittings SAE J846—Coding Systems for Identification of Fluid Conductors and Connectors SAE J1508—Hose Clamp Specifications 2.1.2 ASTM PUBLICATION Available from ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428. ASTM B 117—Method of Salt Spray (Fog) Testing SAE J1231 Revised AUG2004 - 2 - 2.2 Related Publications The following publications are provided for information purposes only and are not a required part of this document. 2.2.1 SAE PUBLICATIONS Available from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001. SAE J516—Hydraulic Hose Fittings SAE J1273—Selection, Installation, and Maintenance of Hose and Hose Assemblies 2.2.2 ANSI PUBLICATION Available from ANSI, 11 West 42nd Street, New York, NY 10036-8002. ANSI/ASME B1.20.1-1983— General Purpose Pipe Threads 3. Size Designations The hose fitting size is generally designated by the fractional inch nominal hose inside diameter together with the nominal pipe or straight thread size. However, these sizes may also be designated by their dash sizes as follows: 3.1 The hose dash size is equivalent to the number of sixteenth inch increments in the hose inside diameter. 3.2 The pipe thread dash size is the number of sixteenth inch increments in the nominal pipe thread size. 3.3 The Oring boss thread dash sizes correspond to the number of sixteenth inch increments in the outside diameter of the tubing with which they are designed to be used. 4. Dimensions and Tolerances Tabulated dimensions shall apply to the finished parts, plated or otherwise processed, as specified by the purchaser. Details of internal construction of fittings are not specified and shall be optional with the manufacturer. Where applicable, the maximum and minimum flat dimensions shall be within the commercial tolerance of bar stock from which the fittings are produced. Formed or upset contours shall fit standard wrench openings. The minimum across corners dimensions of external hexagons shall be 1.092 times the nominal width across flats, but shall not result in a side flat width of less than 0.43 times the nominal width across flats. Except for nominal sizes and thread specifications, dimensions and tolerances are given in SI units. Tolerance on all dimensions not otherwise limited shall be ±0.25 mm. Angular tolerance on axis of ends on elbows shall be ±2.50 degrees for sizes up to and including 9.52 mm and ±1.50 degrees for sizes larger than 9.52 mm. SAE J1231 Revised AUG2004 - 3 - Unless otherwise specified, tolerances on hole diameters designated as a drill in the dimensional tables (Tables 3, 4, and 5) shall conform to Table 1: TABLE 1—TOLERANCES ON DRILLED HOLES Drill Size Range, mm Tolerance on Hole Diameter, mm Plus Tolerance on Hole Diameter, mm Minus 0.35-6.25 0.08 0.08 6.35-12.70 0.10 0.10 13.10-19.05 0.13 0.13 19.40-25.40 0.18 0.13 25.80-38.10 0.20 0.13 38.50 and up 0.25 0.13 5. Passages Where passages in straight fittings are machined from opposite ends, the offset at the meeting point shall not exceed 0.40 mm. The crosssectional area at the junction of fluid passages shall not be less than that of the smallest passage. This assembly passage definition does not apply to bent tubes. 6. Contour Details of contour shall be optional with manufacturer provided the tabulated dimensions are maintained and serviceability of the fittings is not impaired. Wrench flats on elbows shall be optional. 7. Straight Threads Unified Standard Class 2A external and Class 2B internal threads shall apply to plain finish (unplated) fittings having straight threads designated A1 in Figure 3 and Table 5. For externally threaded parts with additive finish, the maximum diameters of Class 2A may be exceeded by the amount of the allowance, that is, the basic diameters (Class 2A maximum diameters plus the allowance) shall apply to an externally threaded part after plating. For internally threaded parts with additive finish, the Class 2B diameters apply after plating. The pitch diameter tolerance shall be the same as the corresponding diameterpitch combination and class of the Unified fine and 12thread series. See SAE J475. Where external threads are produced by roll threading and the body is not undercut, the unthreaded portion adjacent to the shoulder may be reduced to the minimum pitch diameter. External threads shall be chamfered and internal threads shall be countersunk as specified in the illustrations and dimensional tables. 8. Thread Eccentricity Tolerances The various thread elements of Class 2A external and Class 2B internal threads on hose fittings shall be concentric within the limitations specified under General Specifications in SAE J512. SAE J1231 Revised AUG2004 - 4 - 9. Pipe Threads Taper pipe threads designated A in Figure 2 and Table 4 shall conform to the Dryseal American Standard Taper Pipe Thread (NPTF). Specifications are given in detail in SAE J476. At purchaser's option, the pipe thread may be shortened in conformity with the SAE Short Dryseal Taper Pipe Thread (PTF-SAE Short). The length of a fullform external thread shall not be shorter than L plus one pitch (thread) for Dryseal NPTF and L for Dryseal PTFSAE Short; except where the thread is cut through into a relieved body or undercut on the fitting, then the minimum full thread length may be reduced by one pitch (thread). External pipe threads shall be chamfered from the diameters shown in Table 2 to produce the specified length of chamfered or partial thread. TABLE 2—DIMENSIONS OF CHAMFERS ON EXTERNAL PIPE THREADS External Nominal Pipe Thread in Chamfer Dia(1) maximum mm Chamfer Dia(1) minimum mm Length of Chamfered or Partial Thread maximum mm Length of Chamfered or Partial Thread minimum mm 1/8 8.1 7.6 1.40 0.94 1/4 10.7 10.2 2.13 1.42 3/8 14.0 13.4 2.13 1.42 1/2 17.3 16.8 2.72 1.80 3/4 22.6 22.1 2.72 1.80 1 28.4 27.7 3.30 2.21 1 1/4 37.1 36.3 3.30 2.21 1 1/2 43.2 42.4 3.30 2.21 2 55.1 54.4 3.30 2.21 1. Tabulated diameters conform with Appendix A, SAE J476. 10. Materials and Manufacture Formed tube hose fittings shall be made from brass, steel, or other materials listed in SAE J846, and specified by the purchaser. Brass shall be SAE UNS C36000 (half hard), SAE UNS C34500, or SAE UNS C35000 for bar or extruded stock and SAE UNS C37700 for forgings. Steel tubing shall be SAE standard single wall intended for general applications in low pressure automotive and hydraulic systems. When steel tubing is used for a formed tube connection, the wall thickness shall be the manufacturer's option unless specified by the purchaser. Dimension D Nominal I.D. in Table 3 does not apply to steel tubing. However, the D dimension shall be the same as the nominal tubing I.D. SAE J1231 Revised AUG2004 - 5 - At the manufacturer’s option, parts may be machined or milled from bar, forged, or of multiple component design. Fittings made from multiple components shall be capable of withstanding 100 psi (minimum) without leakage or failure. TABLE 3—DIMENSIONS OF FORMED TUBE CONNECTIONS (REFERENCE FIGURE 1) Hose Dash Size Tube OD Nominal mm Tube OD Nominal in A ±0.25 mm B Reference mm C Reference mm D Nominal Drill mm –3 4.76 3/16 5.58 0.41 2.0 3.2 –4 6.35 1/4 7.37 0.51 2.5 4.8 –5 7.94 5/16 9.16 0.61 2.5 6.4 –6 9.52 3/8 10.95 0.71 2.5 7.5 –7 11.11 7/16 12.45 0.71 2.5 9.1 –8 12.7 1/2 14.22 0.76 3.0 10.3 –9 14.29 9/16 15.75 0.76 3.0 11.1 –10 15.88 5/8 17.55 0.84 3.0 12.7 –12 19.05 3/4 20.83 0.89 3.0 15.9 –16 25.4 1 26.92 0.76 3.0 21.4 –20 31.75 1-1/4 34.44 1.35 27.8 –24 38.1 1-1/2 41.25 1.57 34.1 –32 50.8 2 54.51 1.85 46.8 FIGURE 1—FORMED TUBE CONNECTION STYLES SAE J1231 Revised AUG2004 - 6 - 11. Finish The external surfaces and threads of all carbon steel parts shall be plated or coated with a suitable material that passes a 72 h salt spray test in accordance with ASTM B 117. Any appearance of red rust during the 72 h salt spray test shall be considered failure, except for the following: a. All internal fluid passages. b. Edges such as hex points, serrations, and crests of threads where there may be mechanical deformation of the plating or coating typical of mass produced parts or shipping effects. c. Areas where there is mechanical deformation of the plating or coating caused by crimping, flaring, bending, and other post-plate metal forming operations. d. Areas where the parts are suspended or affixed in the test chamber where condensate can accumulate. NOTE—Cadmium plating is not preferred due to environmental reasons. Parts manufactured to this document after January 1, 1997, shall not be Cadmium plated. Internal fluid passages shall be protected from corrosion during storage. Changes in plating may affect assembly torques and require requalification, when applicable. 12. Workmanship Workmanship shall conform to the best commercial practice to produce high quality fittings. Fittings shall be free from all hanging burrs, loose scale, and all other defects that might affect serviceability. All sealing surfaces must be smooth except that annular tool marks up to 2.5 µm maximum, unless otherwise specified, shall be permissible. 13. Assembly Considerations Use of a compatible lubricant or sealant in assembling Dryseal pipe threads may be desirable to minimize galling and effect a tight seal. 14. Formed Tube Connections Formed tube connections may be shaped to either of four styles. Type 2 shall be supplied unless agreed to by the purchaser and the manufacturer. 15. Hose Fittings Two types of hose fittings are defined. Male Dryseal Pipe Thread (Figure 2, Table 4) and Male Straight Thread ORing Boss (Figure 3, Table 5). Type 2 connections shall be supplied unless agreed to by the purchaser and the manufacturer. SAE J1231 Revised AUG2004 - 7 - FIGURE 2—MALE PIPE THREAD HOSE CONNECTOR (430160) TABLE 4A—DIMENSIONS OF MALE PIPE THREAD HOSE CONNECTORS Nominal Hose I.D. mm Hose Dash Size A Dryseal Taper Thread NPTF Thread Dash Size C Nominal Hex inch D(1) from Table 3 mm D1 (1) Drill Dia mm L ±6.4 mm L1 Max mm L2 Max mm L3 mm T Min mm 6 –4 1/8 –2 7/16 4.8 4.8 38.1 63.6 9.7 11.7 5.6 6 –4 1/4 –4 9/16 4.8 7.0 38.1 69.1 14.2 16.2 6.4 10 –6 1/4 –4 5/8 7.5 7.0 38.1 69.1 14.2 16.2 6.4 10 –6 3/8 –6 3/4 7.5 10.3 38.1 71.4 14.2 16.2 6.4 12 –8 3/8 –6 3/4 10.3 10.3 38.1 71.4 14.2 16.2 6.4 12 –8 1/2 –8 15/16 10.3 13.5 38.1 77.8 19.1 21.1 7.9 16 –10 3/8 –6 7/8 12.7 10.3 38.1 71.4 14.2 16.2 6.4 16 –10 1/2 –8 15/16 12.7 13.5 38.1 77.8 19.1 21.2 7.9 20 –12 3/8 –6 1 15.9 10.3 38.1 71.4 14.2 16.2 6.4 20 –12 1/2 –8 1 15.9 13.5 38.1 77.8 19.1 21.2 7.9 20 –12 3/4 –12 1-1/8 15.9 18.0 38.1 79.1 19.1 21.2 9.7 25 –16 3/4 –12 1-1/4 21.4 18.0 38.1 79.1 19.1 21.2 9.7 25 –16 1 –16 1-3/8 21.4 23.8 38.1 83.9 23.9 25.9 9.7 30 –20 1 –16 1-1/2 27.8 23.8 38.1 83.9 23.9 25.9 9.7 30 –20 1-1/4 –20 1-3/4 27.8 31.7 38.1 93.0 24.6 26.6 11.2 30 –20 1-1/2 –24 2 27.8 38.0 38.1 93.8 25.4 27.4 12.7 38 –24 1-1/4 –20 1-3/4 34.1 31.7 38.1 93.0 24.6 26.6 11.2 38 –24 1-1/2 –24 2 34.1 38.0 38.1 93.8 25.4 27.4 12.7 50 –32 1-1/2 –24 2-1/4 46.8 38.0 38.1 93.8 25.4 27.4 12.7 50 –32 2 –32 2-5/8 46.8 49.0 38.1 99.1 26.2 28.2 17.5 1. At the manufacturer’s option, the through passage in Figure 2A may conform with the smaller diameter specified or the appropriate end may be counterbored to the larger diameter. SAE J1231 Revised AUG2004 - 8 - (431460) (430360) TABLE 4B—DIMENSIONS OF 90-DEGREE AND 45-DEGREE MALE PIPE HOSE FITTINGS Nominal Hose I.D. mm Hose Dash Size A Dryseal Taper Thread NPTF Thread Dash Size Minimum Stock Size(1) inch D from Table 3 mm D1 Drill Dia mm L2 Min mm L4 Max mm L5 Max mm L6 ±1.5 mm L7 ±1.5 mm 6 –4 1/8 –2 1/2 4.8 4.8 9.7 58.7 70.1 19.1 11.4 6 –4 1/4 –4 5/8 4.8 7.0 14.2 61.9 74.1 27.8 15.4 6 –4 3/8 –6 3/4 4.8 10.3 14.2 66.7 75.8 31.0 17.1 8 –5 1/8 –2 1/2 6.4 4.8 9.7 58.7 70.1 18.3 11.4 8 –5 1/4 –4 5/8 6.4 7.0 14.2 61.9 74.2 27.8 15.5 10 –6 1/4 –4 5/8 7.5 7.0 14.2 61.9 74.2 27.8 15.5 10 –6 3/8 –6 3/4 7.5 10.3 14.2 66.7 75.8 31.0 17.1 10 –6 1/2 –8 15/16 7.5 13.5 19.1 69.9 79.8 37.3 21.1 12 –8 1/4 –4 3/4 10.3 7.0 14.2 61.9 74.2 28.6 15.5 12 –8 3/8 –6 13/16 10.3 10.3 14.2 66.7 75.7 31.0 17.0 12 –8 1/2 –8 15/16 10.3 13.5 19.1 69.9 79.8 37.3 21.1 12 –8 3/4 –12 1-1/8 10.3 18.0 19.1 76.2 80.3 40.5 21.6 16 –10 1/2 –8 15/16 12.7 13.5 19.1 69.9 79.8 37.3 21.1 16 –10 3/4 –12 1-1/8 12.7 18.0 19.1 76.2 80.3 40.5 21.6 20 –12 1/2 –8 1-1/8 15.9 13.5 19.1 69.9 79.8 39.7 21.1 20 –12 3/4 –12 1-1/8 15.9 18.0 19.1 76.2 80.6 40.5 21.9 20 –12 1 –16 1-3/8 15.9 23.8 23.9 82.6 85.1 50.0 26.4 25 –16 3/4 –12 1-1/8 21.4 18.0 19.1 76.2 80.3 40.5 21.6 25 –16 1 –16 1-3/8 21.4 23.8 23.9 82.6 85.1 50.0 26.4 25 –16 1-1/4 –20 1-3/4 21.4 31.7 24.6 90.5 88.7 60.3 30.0 30 –20 1 –16 1-3/8 27.8 23.8 23.9 82.6 85.4 50.0 26.7 30 –20 1-1/4 –20 1-3/4 27.8 31.7 24.6 90.5 88.7 60.3 30.0 30 –20 1-1/2 –24 2 27.8 38.0 25.4 101.6 90.5 66.7 31.8 38 –24 1-1/4 –20 1-3/4 34.1 31.7 24.6 90.5 88.7 60.3 30.0 38 –24 1-1/2 –24 2 34.1 38.0 25.4 101.6 90.5 66.7 31.8 50 –32 2 –32 2-5/8 46.8 49.0 26.2 114.3 96.5 76.2 37.8 1. Forging, square, or hex form is at the manufacturer’s option. SAE J1231 Revised AUG2004 - 9 - (431560) (431960) TABLE 4C—DIMENSIONS OF 90-DEGREE AND 45-DEGREE LONG DROP MALE HOSE FITTINGS(1) Nominal Hose I.D. mm Hose Dash Size A Dryseal Taper Thread NPTF Thread Dash Size C Nominal Hex inch D from Table 3 mm D1 Drill Dia mm L ±6.4 mm L8 ±1.5 mm L9 ±1.5 mm L10 ±1.5 mm L11 ±1.5 mm 12 –8 1/2 –8 7/8 10.3 13.5 38.1 58.7 73.9 55.6 30.2 20 –12 1/2 –8 1 15.9 13.5 38.1 65.0 81.0 67.6 34.0 20 –12 3/4 –12 1-1/8 15.9 18.0 38.1 65.0 80.3 66.8 33.8 20 –12 1 –16 1-3/8 15.9 23.8 38.1 65.0 84.8 73.2 38.1 25 –16 3/4 –12 1-1/4 21.4 18.0 38.1 74.7 89.4 74.7 36.8 25 –16 1 –16 1-3/8 21.4 23.8 38.1 74.7 91.7 77.7 39.4 30 –20 1 –16 1-1/2 27.8 23.8 38.1 90.4 104.4 85.9 43.7 30 –20 1-1/4 –20 1-3/4 27.8 31.7 38.1 90.4 103.9 84.8 43.2 30 –20 1-1/2 –24 2 27.8 38.0 38.1 90.4 106.7 88.9 46.0 38 –24 1-1/4 –20 1-3/4 34.1 31.7 38.1 103.1 119.1 97.5 49.3 38 –24 1-1/2 –24 2 34.1 38.0 38.1 103.1 120.7 100.1 51.3 50 –32 2 –32 2-5/8 46.8 49.0 38.1 122.2 145.5 141.2 68.3 1. The use of a collar is optional and may be omitted if agreed to by the purchaser and the manufacturer. SAE J1231 Revised AUG2004 - 10 - FIGURE 3A—MALE STRAIGHT THREAD HOSE CONNECTOR (430192) TABLE 5A—DIMENSIONS OF MALE STRAIGHT THREAD HOSE CONNECTORS Nominal Hose I.D. mm Hose Dash Size A1 Nominal Straight Thread Size Thread Dash Size C1 Nominal Hex Inch D(1) from Table 3 mm D2 (1) Drill Dia mm L ±6.4 mm L12 Max mm L13 Min mm L14 Max mm T1 Min mm 6 –4 7/16-20 –4 9/16 4.8 4.4 38.1 64.0 9.14 11.4 7.1 10 –6 9/16-18 –6 11/16 7.5 7.5 38.1 67.1 9.93 11.93 7.9 12 –8 3/4-16 –8 7/8 10.3 9.9 38.1 69.8 11.13 13.13 8.6 12 –8 7/8-14 –10 1 10.3 12.3 38.1 71.4 12.70 14.70 10.2 16 –10 7/8-14 –10 1 12.7 12.3 38.1 71.4 12.70 14.70 10.2 20 –12 7/8-14 –10 1 15.9 12.3 38.1 71.4 12.70 14.70 10.2 20 –12 1-1/16x12 –12 1-1/4 15.9 15.5 38.1 75.1 15.09 17.09 11.9 25 –16 1-1/16x12 –12 1-1/4 21.4 15.5 38.1 75.1 15.09 17.09 11.9 25 –16 1-5/16x12 –16 1-1/2 21.4 21.5 38.1 75.1 15.09 17.09 11.9 25 –16 1-5/8x12 –20 1-7/8 21.4 27.5 38.1 83.5 15.09 17.09 14.7 30 –20 1-5/8x12 –20 1-7/8 27.8 27.5 38.1 83.5 15.09 17.09 14.7 30 –20 1-7/8x12 –24 2-1/8 27.8 33.0 38.1 83.5 15.09 17.09 16.5 38 –24 1-5/8x12 –20 1-7/8 34.1 27.5 38.1 83.5 15.09 17.09 14.7 38 –24 1-7/8x12 –24 2-1/8 34.1 33.0 38.1 83.5 15.09 17.09 16.5 50 –32 2-1/2x12 –32 2-3/4 46.8 45.0 38.1 88.0 15.09 17.09 20.6 1. At the manufacturer’s option, the through passage in Figure 3A may conform with the smaller diameter specified or the appropriate end may be counterbored to the larger diameter. SAE J1231 Revised AUG2004 - 11 - (431492) (430392) TABLE 5B—DIMENSIONS OF 90-DEGREE AND 45-DEGREE STRAIGHT THREAD HOSE FITTINGS(1) Nominal Hose I.D. mm Hose Dash Size A1 Nominal Straight Thread Size Thread Dash Size C1 Nominal Hex Inch Minimum Stock Size(2) Inch D from Table 3 mm D2 Drill Dia mm L15 Max mm L16 Max mm L17 ±1.5 mm L18 ±1.5 mm L19 Min mm L20 Min mm 6 –4 7/16-20 –4 9/16 1/2 4.76 4.37 60.3 77.5 26.2 18.8 7.6 17.8 10 –6 9/16-18 –6 11/16 5/8 7.54 7.54 63.5 79.3 31.5 20.6 7.6 20.3 10 –6 3/4-16 –8 7/8 13/16 7