SAE J514-2-2024 无扩口液压管接头

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For more information on this standard, visit

https://www.sae.org/standards/content/J514/2_202404/

SURFACE VEHICLE

STANDARD

J514™-2

APR2024

Issued 2024-04

Flareless Hydraulic Tube Fittings

RATIONALE

SAE J514 is being split into three parts: (1) 37-degree flare fittings, (2) flareless fittings, and (3) pipe fittings and adapter

unions. Part 1, 37-degree flare fittings, was revised to include new artwork for better clarity, metric hexes for new designs,

and general updates. Parts 2 and 3 will be separated out with no technical changes, except those to harmonize the

SAE straight thread dimensions with the revised SAE J1926-3 document and rationalized metric pressure rating numbers.

1. SCOPE

This SAE Standard covers complete general and dimensional specifications for flareless type of hydraulic tube fittings.

These fittings are intended for general application in hydraulic systems on industrial equipment and commercial products.

These fittings are capable of providing leakproof, full flow connections in hydraulic systems operating at working pressures

as specified in Table 1.

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.

Table 1 - Working pressure ratings(a) capable of 4-to-1 minimum burst

Nom

SAE

Dash

Size

Nom

Tube

(mm)

Nom

Tube

(inch)

Straight

Thread

Size

Nom

Pipe

Size

Rigid

SAE St.

Threads

Unions and

Bulkheads

(MPa)

Rigid

SAE St.

Threads

Unions and

Bulkheads

(psi)

Adjustable

SAE St.

Threads

and Female

Swivels

(MPa)

Adjustable

SAE St.

Threads

and Female

Swivels

(psi)

Fittings

With Pipe

Threads

(MPa)

Fittings

With Pipe

Threads

(psi)

3.18

0.125

5/16-24

1/8

5000

4.76

0.188

3/8-24

1/8

5000

6.35

0.250

7/16-20

1/8

5000

31.5

4500

5000

7.94

0.313

1/2-20

1/8

5000

4000

5000

9.52

0.375

9/16-18

1/4

5000

4000

12.70

0.500

3/4-16

3/8

31.5

4500

4000

3000

15.88

0.625

7/8-14

1/2

24.5

3500

3000

19.05

0.750

1-1/16-12

3/4

24.5

3500

3000

17.5

2500

22.22

0.875

1-3/16-12

3/4

3000

17.5

2500

17.5

2500

25.40

1.000

1-5/16-12

3000

17.5

2500

2000

31.75

1.250

1-5/8-12

1-1/4

17.5

2500

2000

1150

38.10

1.500

1-7/8-12

1-1/2

2000

10.5

1500

1000

50.80

2.000

2-1/2-12

10.5

1500

1125

1000

(a) Working pressures given are for low-carbon steel fittings only. Consult the manufacturer for values for other materials.

Formerly, SAE J514 was organized as a single document with ten clauses, which included six sections. This revision of

SAE J514 has been organized into three sections as follows:

SAE INTERNATIONAL J514™-2 APR2024 Page 2 of 36

• Part 1: 37-degree flared fittings

• Part 2: Flareless (bite type) fittings

• Part 3: NPTF pipe fittings and pipe unions

It is important to note that this and all SAE J-documents are intended for ground vehicle use only and not intended for

aerospace applications.

2. REFERENCES

2.1 Applicable Documents

The following publications form a part of this specification to the extent specified herein. Unless otherwise indicated, the

latest issue of SAE publications shall apply.

2.1.1 SAE Publications

Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA

and Canada) or +1 724-776-4970 (outside USA), www.sae.org.

SAE J405 Chemical Compositions of SAE Wrought Stainless Steels

SAE J476 Dryseal Pipe Threads

SAE J515 Specification for O-Ring Materials Used with Hydraulic Connectors

SAE J846 Coding Systems for Identification of Fluid Conductors and Connectors

SAE J1065 Nominal Reference Working Pressures for Steel Hydraulic Tubing

SAE J1926-3 Connections for General Use and Fluid Power - Ports and Stud Ends with ASME B1.1 Threads and O-Ring

Sealing - Part 3: Light-Duty (L-Series) Stud EndsSAE J2593Information report for the Installation of Fluid

Conductors and Connectors

2.1.2 ANSI Accredited Publications

Copies of these documents are available online at https://webstore.ansi.org/.

ASME B1.1 Unified Inch Screw Threads (UN and UNR Thread Form)

ANSI B18.2.2 Standard Wrench Openings

ANSI B1.20.3 Dryseal Pipe Threads (Inch)

2.1.3 ASTM Publications

Available from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959,

Tel: 610-832-9585, www.astm.org.

ASTM B117 Method of Salt Spray (Fog) Testing

SAE INTERNATIONAL J514™-2 APR2024 Page 3 of 36

2.1.4 ISO Publications

Copies of these documents are available online at https://webstore.ansi.org/.

ISO 19879 Metallic tube connections for fluid power and general use - Test methods for hydraulic fluid power

connections

ISO 9227 Corrosion Tests in Artificial Atmospheres - Salt Spray Tests

3. GENERAL SPECIFICATIONS

The following general specifications supplement the dimensional data contained in Tables 4 to 8 with respect to all

unspecified detail.

3.1 Size Designations

Fitting sizes are designated by the corresponding outside diameter of the tubing for the flareless tube end and by the

corresponding standard nominal pipe size for pipe thread ends or corresponding nominal dash size for the SAE straight

thread ends or corresponding nominal dash size for the SAE straight thread ends.

Refer to SAE J846 for nominal sizes, proper coding, and call out.

3.2 Dimensions and Tolerances

Except for nominal sizes and thread specifications, dimensions and tolerances are given in both SI Units and U.S.

customary, as designated. Tabulated dimensions shall apply to the finished parts, plated or otherwise processed, as

specified by the purchasers. Hex tolerances across flats are listed in Table 1A. The minimum across corners dimensions of

hexagons shall be 1.092 times the nominal width across flats, but shall not result in a side-flat width less than 0.43 times

the nominal width across flats. The minimum across-corners dimensions of external squares shall be 1.25 times the nominal

width across flats, but shall not result in a side flat width less than 0.75 times the nominal width across the flats.

Table 1A - Hex tolerances

Nominal

Hex Size

Across

Flats

(mm)

Over

Nominal

Hex Size

Across

Flats

(mm)

Include

Nominal

Hex Size

Across Flats

(inch)

Over

Nominal

Hex Size

Across Flats

(inch)

Include

Tolerance

Minus

Only

(mm)

Tolerance

Minus

Only

(inch)

—

19.05

—

0.750

0.3

0.012

19.05

25.40

0.750

1.000

0.4

0.016

25.40

34.92

1.000

1.375

0.5

0.020

34.92

AND UP

1.375

AND UP

0.8

0.031

Tolerance on all dimensions not otherwise limited shall be ±0.4 mm (±0.016 inch). Fitting seats shall be concentric with

straight thread pitch diameters within 0.25 mm (0.010 inch) full indicator movement (FIM).

Unless otherwise specified, tolerance on hole diameters for designated drills in the dimensional tables shall be as tabulated

in Table 1B:

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标签： #接头 #管 #液压

摘要：

SAE J514-2-2024 是国际汽车工程师学会（SAE）发布的最新版无扩口液压管接头标准，专门针对液压系统中广泛使用的无扩口（也称为O型圈端面密封或O型圈密封）管接头设计、尺寸、材料及性能要求进行了全面规范。该标准在原有基础上进行了技术更新，明确了无扩口管接头在高压、高温及振动工况下的密封可靠性，适用于工程机械、农业设备、航空航天及工业液压系统等领域的管路连接。标准中详细规定了接头的螺纹规格、密封面几何公差、表面处理及扭矩测试方法，确保不同制造商生产的接头与管体之间的互换性和泄漏性能。对于

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