Standard
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AS D26-1972
[Current]Tube fittings with dryseal American standard taper pipe and unified threads for automotive and industrial use (imperial units)
Provides a range of tables covering dimensions of flared, inverted flared and compression type fittings in the range 1/8 in. to 1 in. The Standard is intended primarily for the automotive industry, but the fittings are also used extensively in other sections of industry.
Published: 30/01/1991
Pages: 45
Table of contents
Cited references
Content history
Table of contents
Header
About this publication
PREFACE
1 SCOPE AND SIZE DESIGNATION
1.1 SCOPE
1.2 SIZE DESIGNATION
1.3 DEVIATION FROM STANDARD
2 DIMENSIONS AND TOLERANCES APPLYING TO ALL FITTINGS
2.1 GENERAL
2.2 BAR SECTIONS
2.3 HOLE DIAMETERS
2.4 ANGULAR TOLERANCE
2.5 PASSAGES
2.6 WALL THICKNESS
2.7 CONTOUR
3 SCREW THREADS
3.1 STRAIGHT SCREW THREADS
3.1.1 Thread Form
3.1.2 Unplated Fittings
3.1.3 Plated Fittings with External Threads
3.1.4 Plated Fittings with Internal Threads
3.1.5 Roll Threading
3.1.6 Chamfer
3.1.7 Counter-sink
3.1.8 Thread Eccentricity Tolerances
3.2 PIPE THREADS
3.2.1 Thread Form
3.2.2 Length of Thread
3.2.3 Roll Threading
3.2.4 Chamfer
4 MATERIALS AND MANUFACTURE
4.1 MATERIALS
4.2 MANUFACTURE
4.3 SEALING SURFACES
4.4 WORKMANSHIP
4.5 FINISH
4.6 MARKING
5 DESIGN PRESSURES AND TEST REQUIREMENTS
5.1 DESIGN PRESSURES
5.2 TYPE TEST OF ASSEMBLED JOINT
5.3 WRENCHING TEST FOR INVERTED FLARED NUTS
6 FLARED TYPE FITTINGS
6.1 DIMENSIONS AND TOLERANCES
6.2 CONCENTRICITY OF SEATS
7 INVERTED FLARED TYPE FITTINGS
7.1 DIMENSIONS AND TOLERANCES
7.2 CONCENTRICITY OF SEATS
7.3 THREAD RELIEF
8 BALL SLEEVE (COMPRESSION) TYPE FITTINGS
8.1 DIMENSIONS AND TOLERANCES
9 DIMENSIONS OF SINGLE AND DOUBLE 45-DEGREE FLARES FOR TUBING
9.1 DIMENSIONS AND TOLERANCES
9.2 SQUARENESS
9.3 WORKMANSHIP
APPENDIX A
A1 GENERAL
A2 GAUGING OF CONE SEATS
A3 GAUGING OF INTERNAL THREADS
A.3.1 Size and Form
A.3.2 Full Form Thread Depth
APPENDIX B
B1 CODE
B2 SIZE
B2.1 Tube Size
B2.2 Pipe Size
B2.3 Sequence
B3 FITTING IDENTIFICATION
B4 APPLICATION OF CODE
Cited references in this standard
Content history
AS D26-1972 REC:2018
Doc. 1787
SAE J512
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