1、SAETechnicalStandardsBoardRulesprovidethat:“ThisreportispublishedbySAEtoadvancethestateoftechnicalandengineeringsciences.Theuseofthisreportisentirelyvoluntary,anditsapplicabilityandsuitabilityforanyparticularuse,includinganypatentinfringementarisingtherefrom,isthesoleresponsibilityoftheuser.”SAErevi
2、ewseachtechnicalreportatleasteveryfiveyearsatwhichtimeitmaybereaffirmed,revised,orcancelled.SAEinvitesyourwrittencommentsandsuggestions.SHEET 1 OF 2MA3274THIRD ANGLE PROJECTIONAEROSPACE STANDARDMA3274ISSUED1992-10REAFFIRMED2004-07NUT - SELF-LOCKING, CLINCH, SERRATED SHANK, 400 C, DRY FILM COATED,UNS
3、 S66286, MJ THREAD, METRICPREPARED BY SAE COMMITTEE E-25, GENERAL STANDARDS FOR AEROSPACE PROPULSION SYSTEMSFEDERAL SUPPLY CLASS5310FIGURE 1 TABLE 1Copyright 2004 SAE International All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any
4、 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: custsvcsae.org SAE WEB ADDRESS: http:/www.s
5、ae.org Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NUT - SELF-LOCKING, CLINCH,SERRATED SHANK, 400 C, DRY FILM COATED,UNS S66286, MJ THREAD, METRICAEROSPACE STANDARD MA3274SHEET 2 OF 2MA3274TABLE
6、2 - DIMENSIONSTABLE 2A - DIMENSIONS A-JTABLE 2B - DIMENSIONS K-SNOTES:1. MATERIAL: CORROSION AND HEAT RESISTANT STEEL, AMS 5731 OR AMS 5734 (UNS S66286).2. HARDNESS: 29 TO 39 HRC.3. FINISH: DRY FILM COATING PER MIL-L-81329. DIMENSIONS ARE PRIOR TO COATING.4. FLUORESCENT PENETRANT INSPECTION PER AMS
7、2645 BEFORE COATING. ACCEPTANCE STANDARD PER MA1568. 5. SURFACE TEXTURE: SYMBOLS PER ANSI Y14.36. REQUIREMENTS PER ANSI/ASME B46.1. UNLESS OTHERWISE SPECIFIED, SURFACES TO BE 3.2 m Ra, EXCEPT THREADS TO BE 1.6 m Ra AND SERRATIONS TO BE 6.3 m Ra.6. PROCUREMENT SPECIFICATION: MA1568 EXCEPT:a. MINIMUM
8、TORQUE-OUT LOAD FOR TORQUE-OUT TEST SHALL BE AS SHOWN IN TABLE 1 WHEN INSTALLEDIN A HOLE CONFORMING TO AS4389 IN AN AMS 5732 TEST PLATE.b. HIGH TEMPERATURE REUSEABILITY TEST SHALL BE REPEATED FOR A TOTAL OF 25 CYCLES.c. ALL FRICTION SURFACES SHALL BE LUBRICATED WITH AMS 2518 GRAPHITE PETROLATUM ANTI
9、SEIZETHREAD COMPOUND PRIOR TO INSTALLATION OF THE BOLT ON EVERY ASSEMBLY TORQUE CYCLE.7. DIMENSIONS ARE IN MILLIMETERS.8. BREAK SHARP EDGES 0.1 TO 0.4, UNLESS OTHERWISE SPECIFIED.9. PRODUCT QUALIFICATION: QUALIFICATION TESTS IN ACCORDANCE WITH MA1568 SHALL BE PERFORMED BY THE VENDOR PRIOR TO FIRST S
10、HIPMENT OF PARTS.10. DO NOT USE UNASSIGNED PART NUMBERS.11. AS, MA, AND AMS ARE SAE PUBLICATIONS, ANSI IS AN AMERICAN NATIONAL STANDARDS INSTITUTE PUBLICATION, AND MIL SPECIFICATION IS A DEPARTMENT OF DEFENSE PUBLICATION.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
