1、 AEROSPACE STANDARD (R) NUT, CLUSTER FITTING, RETAINER AS21937 Copyright 2007 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,
2、 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: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org ISSUED 1998-08REAFFIRMED 2004-04REVISED 2007-11 THIRD ANGLE PROJECTION
3、 CUSTODIAN: SAE G-3/G-3B REV. A FEDERAL SUPPLY CLASS4730 AS21937 SHEET 1 OF 3 REV. A PROCUREMENT SPECIFICATION: AS18280 /10/SAE TechnicalStandards Board Rules provide that: “This report is published by SAE toadvance thestate of technical andengineering sciences.The use of thisreport is entirely volu
4、ntary, andits applicabilityandsuitability forany particularuse,including any patent infringement arising therefrom, is thesole responsibility oftheuser.” SAE reviews each technical report at least every five yearsat which time it may be reaffirmed, revised, orcancelled.SAE invites yourwritten commen
5、tsandsuggestions.RATIONALE THIS FITTING STANDARD IS REVISED TO INCLUDE PRI-QPL REQUIREMENTS, UPDATED THE WEIGHT VALUES IN TABLE AND MAINTAIN TO SUPPORT MILITARY AIRCRAFT CURRENTLY IN OPERATION. NOTICE THE INITIAL SAE PUBLICATION OF THIS DOCUMENT WAS TAKEN DIRECTLY FROM U.S MILITARY STANDARD MS21937B
6、. THIS SAE STANDARD RETAINS THE SAME PART NUMBER ESTABLISHED BY THE ORIGINAL MILITARY DOCUMENT. FIGURE 1 - NUT, CLUSTER FITTING, RETAINER, DIMENSIONS AND CONFIGURATION TABLE 1A - NUT, CLUSTER FITTING, RETAINER, LOW FLOW, DIMENSIONS LOW FLOW SIZE DASH NO. TUBE OD THREAD T AS8879 A B C +.015 -.000 D 2
7、 E F H WEIGHT LB EACH APPROX -4L .2500 .4375-20 UNJF-3B .406 .687 .437 14 .562 .687 .687 .009 INACTIVE PART /15/ Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-AEROSPACE STANDARD (R) NUT, CLUSTER FI
8、TTING, RETAINER AS21937 SHEET 2 OF 3 REV. A TABLE 1B - NUT, CLUSTER FITTING, RETAINER, HIGH FLOW, DIMENSIONS HIGH FLOW SIZE DASH NO. TUBE OD THREAD T AS8879 A B C +.015 -.000 D +2 E F H WEIGHT LB EACH APPROX -4H .2500 .4375-20 UNJF-3B .500 1.000 .437 13 .875 1.000 1.000 .0290 -5H .3125 .5000-20 UNJF
9、-3B .500 1.000 .500 13 .875 1.000 1.000 .0274 -6H .3750 .5625-18 UNJF-3B .500 1.000 .562 13 .875 1.000 1.000 .0257 -8H .5000 .7500-16 UNJF-3B .500 1.000 .750 13 .875 1.000 1.000 .0193 NOTES: 1. MATERIALS: ALUMINUM ALLOY 7075 BAR OR FORGING SEE PROCUREMENT SPECIFICATION. 2. FINISH: SEE PROCUREMENT SP
10、ECIFICATION. 3. REMOVE BURRS AND SHARP EDGES. 4. INSTALLATION IN ACCORDANCE WITH MS21931. 5. SURFACE FINISH IN ACCORDANCE WITH ASME B46.1. UNLESS OTHERWISE SPECIFIED ALL OUTSIDE MACHINED SURFACE SHALL BE 125 in Ra AND ALL INSIDE SURFACE SHALL BE 250 in Ra. 6. DIMENSIONS ARE IN INCHES. UNLESS OTHERWI
11、SE SPECIFIED TOLERANCES DECIMALS +.010, ANGLES +.5. 7. DIMENSIONING AND TOLERANCING IN ACCORDANCE WITH ASME Y14.5M-1994. 8. PART NUMBERS: LETTERS “L” AND “H” IN PART NUMBER INDICATE LOW FLOW AND HIGH FLOW RESPECTIVELY. CODE “W FOLLOWING BASIC PART NUMBER MS21937 SPECIFIES 7075 ALUMINUM ALLOY. NO COD
12、E LETTER FOR ALUMINUM ALLOY 2014/2024 ARE CANCELLED SUPERSEDED BY CODE “W” 7075 ALUMINUM. 2014/2024 PARTS ARE NO LONGER AVAILABLE FOR PROCUREMENT AFTER 2006. EXAMPLES OF PART NUMBERS: MS21937W4L - NUT, .2500 TUBING, LOW FLOW, 7075 ALUMINUM ALLOY MS21937W6H - NUT, .3750 TUBING, HIGH FLOW, 7075 ALUMIN
13、UM ALLOY Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-AEROSPACE STANDARD (R) NUT, CLUSTER FITTING, RETAINER AS21937 SHEET 3 OF 3 REV. A 9. SEE TABLE 2 FOR CANCELLED AND SUPERSEDED DOCUMENT AND PAR
14、T NUMBERS. TABLE 2 CANCELLED DOCUMENT NUMBER PREVIOUS PART NUMBERS SUPERSEDING DOCUMENT NUMBER RETAINING PART NUMBERS MS21937 MS21937-4L AS21937 MS21937W4L MS21937 MS21937W4L AS21937 MS21937W4LMS21937 MS21937-4H AS21937 MS21937W4H MS21937 MS21937W4H AS21937 MS21937W4H MS21937 MS21937-5H AS21937 MS21
15、937W5H MS21937 MS21937W5H AS21937 MS21937W5H MS21937 MS21937-6H AS21937 MS21937W6H MS21937 MS21937W6H AS21937 MS21937W6H MS21937 MS21937-8H AS21937 MS21937W8H MS21937 MS21937W8H AS21937 MS21937W8H /10/ PROCUREMENT SPECIFICATION: AS18280 EXCEPT AS SPECIFIED ON THIS STANDARD. PRODUCT SUPPLIED TO THIS
16、SPECIFICATION SHALL BE MANUFACTURED BY AN ACCREDITED MANUFACTURER LISTED IN THE PERFORMANCE REVIEW INSTITUTE (PRI) QUALIFIED PRODUCTS LIST PRI-QPL-AS18280 FOR THIS STANDARD. SEE “” FOR CURRENT QPL ONLINE. 11. THIS STANDARD IS USED TO IMPLEMENT INTERNATIONAL STANDARDIZATION AGREEMENTS: NATO STANAG 35
17、10 AND ASCC AIR STANDARD 25/6. PLEASE NOTIFY THE FOLLOWING OFFICES WHEN CHANGES ARE MADE OR CONTACT THESE OFFICES FOR INQUIRIES PERTAINING TO THESE AGREEMENTS. NORTH ATLANTIC TREATY ORGANIZATION (NATO) STANDARDIZATION AGENCY, “NSAHQ.NATO.INT”, TEL -0032-2-707-5576, FAX - 0032-2-707-5718, 1110 BRUSSE
18、LS, BELGIUM, AND AIR STANDARDIZATION COORDINATION COMMITTEE, “ASCCMCASPENTAGON.AF.MIL5”, TEL - 1 703-696-8452, 1815 N. FORT MEYER DRIVE, SUITE 400, ARLINGTON VA 22209-1809, USA. 12. INTERPRETATION OF DRAWING PER ARP4296. 13. FLUID PASSAGE HOLE CONTOUR ARP4266 (OPTIONAL). 14. IN THE EVENT OF A CONFLI
19、CT BETWEEN THE TEXT OF THIS STANDARD AND THE REFERENCED CITED HEREIN, THE TEXT OF THIS STANDARD SHALL TAKE PRECEDENCE. 15. THESE PARTS ARE INACTIVATED FOR NEW DESIGN EFFECTIVE AUGUST 14, 2007. FOR NEW DESIGN SEE STANDARD REDUCER FITTINGS. 16. THE CHANGE BAR ( I ) LOCATED IN THE LEFT MARGIN IS FOR TH
20、E CONVENIENCE OF THE USER IN LOCATING AREAS WHERE TECHNICAL REVISIONS, NOT EDITORIAL CHANGES HAVE BEEN MADE TO THE PREVIOUS ISSUE OF THE DOCUMENT. AN (R) SYMBOL TO THE LEFT OF THE DOCUMENT TITLE INDICATES A COMPLETE REVISION OF THE DOCUMENT. Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
