1、 AEROSPACE STANDARD COUPLING, FLEXIBLE, VARIABLE CAVITY, THREADED FERRULE TYPE TUBE ENDS, ENVELOPE DIMENSIONS, DESIGN STANDARD, METRIC MA2251Copyright 2015 SAE International All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form o
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3、ww.sae.org ISSUED 1992-03REVISED 1994-01 REAFFIRMED 2015-04THIRD ANGLE PROJECTION CUSTODIAN: G-3/G-3A REV.A FEDERAL SUPPLY CLASS 4730MA2251A SHEET 1 OF 4 REV. A PROCUREMENT SPECIFICATION: /3/ MA2250SAE Technical Standards Board Rules provide that: “This report ispublished by SAE toadvance thestate o
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5、ay berevised,reaffirmed, stabilized, orcancelled. SAE invites yourwrittencomments andsuggestions. SAE values your input. To provide feedbackon this Technical Report, please visit http:/www.sae.org/technical/standards/MA2251A RATIONALE MA2251A HAS BEEN REAFFIRMED TO COMPLY WITH THE SAE FIVE-YEAR REVI
6、EW POLICY. FIGURE 1 - FULL COUPLINGFIGURE 2 - HALF COUPLINGAEROSPACE STANDARD MA2251 SHEET 2 OF 4 REV. A COUPLING, FLEXIBLE, VARIABLE CAVITY, THREADED FERRULE TYPE TUBE ENDS, ENVELOPE DIMENSIONS, DESIGN STANDARD, METRIC FIGURE 3 - EXPLODED VIEW FULL COUPLING /10/FIGURE 4 - AS1712 COUPLING SUBASSEMBL
7、Y /11/FIGURE 5 - AS1713 HALF COUPLING SUBASSEMBLY /12/AEROSPACE STANDARD MA2251 SHEET 3 OF 4 REV. A COUPLING, FLEXIBLE, VARIABLE CAVITY, THREADED FERRULE TYPE TUBE ENDS, ENVELOPE DIMENSIONS, DESIGN STANDARD, METRIC TABLE 1 - DIMENSIONSAEROSPACE STANDARD MA2251 SHEET 4 OF 4 REV. A COUPLING, FLEXIBLE,
8、 VARIABLE CAVITY, THREADED FERRULE TYPE TUBE ENDS, ENVELOPE DIMENSIONS, DESIGN STANDARD, METRIC NOTES:1. MATERIAL: SEE PARTS STANDARDS AND MA2250.2. FINISH: SEE PARTS STANDARDS AND MA2250./3/ THESE COUPLING ASSEMBLIES ARE QUALIFIED IN ACCORDANCE WITH PROCUREMENT SPECIFICATION MA2250. USERS OF THESE
9、COUPLINGS ARE ADVISED TO CONTROL SOURCE APPROVAL(S) BY STANDARD PAGE SUPPLEMENT SHEET(S) OR SIMILAR MEANS.4. TUBING SIZES ARE PER ISO 2964./5/ THESE COUPLING ASSEMBLIES USE NONSTANDARD TUBE DIAMETERS.6. DIMENSIONS AND TOLERANCING PER ANSI Y14.5M USING SI METRIC UNITS./7/ THE DASH NUMBERS LISTED IN T
10、HE TABULATION ARE STANDARD O-RING SIZES AS DEFINED BY AS568. O-RING MATERIAL IS TO BE SELECTED ON THE BASIS OF FLUID COMPATIBILITY AND ARE USER FURNISHED./8/ THIS DIMENSION IS A MINIMUM FOR INSTALLATION. ADD 12.7 mm OR MORE, IF POSSIBLE, TO EASE INSTALLATION./9/ DESIGN INSTALLATION TO ONE-HALF “F” O
11、R 6.35 mm, WHICHEVER IS LESS. FULL COUPLING ASSEMBLIES ARE DESIGNED FOR A MAXIMUM MISALIGNMENT OF 4 OR FOR A MAXIMUM “F” GAP OF 6.35 mm OR IN COMBINATION, A MINIMUM GAP OF 1.59 mm AND 3 MISALIGNMENT./10/ A FULL COUPLING ASSEMBLY CONSISTS OF THE FOLLOWING COMPONENTS:a. AS1714 ONE NUT ASSEMBLYb. AS171
12、5 TWO WASHERSc. MA2256 TWO FERRULES (OR FERRULE ENDS IN ACCORDANCE WITH AS1720)d. AS1717 TWO RETAINERS (USE ONE FOR SIZES 124 AND 140)e. AS1718 ONE BODYf. TWO-O-RINGS (TO BE DETERMINED AND SUPPLIED BY USER)/11/ THIS IS A FULL COUPLING SUBASSEMBLY (AS1712) (LESS FERRULES AND SEALS). IT IS USED TO SIM
13、PLIFY DRAWING CALLOUTS AND CONSISTS OF THE FOLLOWING:a. AS1714 ONE NUT ASSEMBLYb. AS1715 TWO WASHERSc. AS1717 TWO RETAINERS (USE ONE FOR SIZES 124 AND 140)d. AS1718 ONE BODY/12/ THIS IS A HALF COUPLING SUBASSEMBLY (AS1713) (LESS FERRULE AND SEAL). IT IS USED TO SIMPLIFY DRAWING CALLOUTS AND CONSISTS OF THE FOLLOWING:a. AS1714 ONE NUT ASSEMBLYb. AS1715 TWO WASHERS13. DIMENSIONS ARE IN MILLIMETERS UNLESS OTHERWISE SPECIFIED. TOLERANCES: LINEAR DIMENSIONS 0.25; ANGULAR DIMENSION 2.14. BREAK EDGES 0.1 TO 0.4 UNLESS OTHERWISE SPECIFIED.
