1、 AEROSPACE STANDARD NUT, SLEEVE COUPLING, FLARELESS AS21921Copyright 2010 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, wit
2、hout 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 2007-07REVISED 2010-11THIRD ANGLE PROJECTION CUST
3、ODIAN: SAE G-3/G-3B REV.C FEDERAL SUPPLY CLASS 4730 AS21921SHEET 1 OF 4 REV. C PROCUREMENT SPECIFICATION: /14/ AS18280SAE TechnicalStandards Board Rules provide that: “This report ispublished bySAE toadvance thestate of technicalandengineering sciences. Theuse of thisreport is entirelyvoluntary, and
4、its applicability andsuitability forany particularuse,including any patent infringement arising therefrom, isthe soleresponsibilityof the user.”SAE reviews eachtechnicalreport at least every five years at which time it may bereaffirmed, revised,orcancelled.SAE invites yourwritten comments andsuggest
5、ions. SAE values your input. To provide feedbackon this Technical Report, please visit http:/www.sae.org/technical/standards/AS21921C RATIONALE STANDARD UPDATED TO CORRECT SAE TEMPLATE TO ADD A REVISION BLOCK; EXPANDED TOLERANCES OF DIMENSION H BY INCORPORATING THE REQUIREMENTS OF ARP1201, REVISED N
6、OTES 9 AND 10 AND GENERAL SAE UPDATING. NOTICE THE INITIAL SAE PUBLICATION OF THIS DOCUMENT WAS TAKEN DIRECTLY FROM U.S. MILITARY STANDARD MS21921. THIS SAE STANDARD RETAINS THE SAME PART NUMBERS ESTABLISHED BY THE ORIGINAL MILITARY DOCUMENT. FIGURE 1 - NUT, SLEEVE COUPLING, FLARELESS AEROSPACE STAN
7、DARD AS21921 SHEET 2 OF 4 REV. C NUT, SLEEVE COUPLING, FLARELESS TABLE 1A - DIMENSIONS A-E DASH NO /8/ NOMINAL TUBE SIZE T THREAD /6/ AS8879 A .010 B .010 C +.005 -.000 D .016 E /6/ +.005 -.000 -2 .125 .3125-24 UNJF-3B .53 .14 .365 .328 .171 -3 .188 .3750-24 UNJF-3B .58 .10 .427 .391 .232 -4 .250 .4
8、375-20 UNJF-3B .72 .18 .552 .453 .300 -5 .313 .5000-20 UNJF-3B .76 .18 .615 .516 .366 -6 .375 .5625-18 UNJF-3B .80 .18 .677 .578 .425 -8 .500 .7500-16 UNJF-3B .86 .18 .865 .766 .552 -10 .625 .8750-14 UNJF-3B .98 .22 .990 .891 .690 -12 .750 1.0625-12 UNJ-3B 1.00 .24 1.240 1.078 .826 -16 1.000 1.3125-
9、12 UNJ-3B 1.05 .26 1.490 1.328 1.074-20 1.250 1.6250-12 UNJ-3B 1.05 .26 1.990 1.641 1.330-24 1.500 1.8750-12 UNJ-3B 1.03 .22 2.236 1.891 1.580 -32 2.000 2.5000-12 UNJ-3B 1.12 .22 2.865 2.562 2.080TABLE 1B - DIMENSIONS F-K DASH NO /8/ F MIN G .010 H K .010 /6/ /11/ WEIGHT, LB/EA, APPROX, REF STEEL AL
10、 ALLOY TI ALLOY -2 .360 .425 .365 - .377 - .008 .003 .004 -3 .366 .429 .428 - .440 - .010 .004 .005 -4 .431 .547 .552 - .565 - .028 .010 .016 -5 .444 .562 .615 - .630 - .032 .012 .018 -6 .422 .578 .678 - .691 - .037 .014 .021 -8 .516 .609 .865 - .878 - .070 .025 .040 -10 .578 .687 .990 - 1.003 - .08
11、3 .031 .047 -12 .562 .687 1.238 - 1.253 - .148 .054 .085 -16 .562 .687 1.488 - 1.505 - .220 .078 .126 -20 .562 .678 1.988 - 2.005 1.482 .470 .181 .271 -24 .562 .678 2.234 - 2.260 1.731 .530 .250 .305 -32 .562 .687 2.859 - 2.885 2.295 .860 .413 .495 NOTES: NOTICE THIS DOCUMENT REFERENCES A PART WHICH
12、 CONTAINS CADMIUM AS A PLATING MATERIAL. CONSULT LOCAL OFFICIALS IF YOU HAVE QUESTIONS CONCERNING CADMIUMS USE. 1. MATERIAL SEE PROCUREMENT SPECIFICATION. ALLOY STEEL ALUMINUM ALLOY CORROSION RESISTANT STEEL TITANIUM ALLOY 2. FINISH: SEE PROCUREMENT SPECIFICATION. 3. BREAK EDGES .003 TO .015 UNLESS
13、OTHERWISE SPECIFIED. 4. DIMENSIONS ARE IN INCHES. UNLESS OTHERWISE SPECIFIED, TOLERANCES: DECIMALS .005, ANGLES 0 DEGREES 30. AEROSPACE STANDARD AS21921 SHEET 3 OF 4 REV. C NUT, SLEEVE COUPLING, FLARELESS 5. SURFACE TEXTURE: SYMBOLS PER ASME Y14.36M; REQUIREMENTS PER ASME B46.1; UNLESS OTHERWISE SPE
14、CIFIED MACHINED SURFACES SHALL BE 125 Ra. /6/ CIRCULAR SURFACES OF DIAMETERS E, K, AND THREAD T SHALL BE CONCENTRIC WITHIN .005. 7. INTERCHANGEABILITY RELATIONSHIP: MS21917 AND MS21921 PARTS IDENTIFIED BY THE SAME DASH NUMBERS ARE FUNCTIONALLY INTERCHANGEABLE. USE MS21921 AND MS21922 AS ASSEMBLY WHE
15、N SUBSTITUTING FOR MS21917 AND MS21918. /8/ PART NUMBERS: DASH “” IN PART NUMBER FOR 4130 ALLOY STEEL IS CANCELLED AND REPLACED, SEE TABLE 2 /A/ ADD “V(SIZE)P” IN PLACE OF DASH FOR CORROSION RESISTANT STEEL (15-5PH), CADMIUM PLATED ADD “V” IN PLACE OF DASH FOR CORROSION RESISTANT STEEL (15-5PH), NOT
16、 CADMIUM PLATED ADD “D” AFTER DASH NUMBER FOR ALUMINUM ALLOY (2024): CANCELLED AND REPLACED, SEE TABLE 2 /C/ ADD “W” AFTER DASH NUMBER FOR ALUMINUM ALLOY (7075) ADD “J” AFTER DASH NUMBER FOR CORROSION RESISTANT STEEL (TYPE 304) ADD “K” AFTER DASH NUMBER FOR CORROSION RESISTANT STEEL (TYPE 316) ADD “
17、R” AFTER DASH NUMBER FOR CORROSION RESISTANT STEEL (TYPE 321) ADD “S” AFTER DASH NUMBER FOR CORROSION RESISTANT STEEL (TYPE 347): CANCELLED, SEE TABLE 2 /D/ ADD “T” AFTER DASH NUMBER FOR TITANIUM ALLOY (6AL-4V) EXAMPLES OF PART NUMBERS: MS21921-4 NUT, .250 TUBING, 4130 ALLOY STEEL IS CANCELLED AND R
18、EPLACED, SEE TABLE 2 /A/ MS21921V4P NUT, .250 TUBING, CORROSION RESISTANT STEEL (15-5PH), CADMIUM PLATED MS21921V4 NUT, .250 TUBING, CORROSION RESISTANT STEEL (15-5PH), NOT CADMIUM PLATED MS21921-4D NUT, .250 TUBING, ALUMINUM ALLOY (2024) IS CANCELLED AND REPLACED, SEE TABLE 2 /C/ MS21921-4W NUT, .2
19、50 TUBING, ALUMINUM ALLOY (7075) MS21921-4J NUT, .250 TUBING, CORROSION RESISTANT STEEL (TYPE 304) MS21921-4K NUT, .250 TUBING, CORROSION RESISTANT STEEL (TYPE 316) MS21921-4R NUT, .250 TUBING, CORROSION RESISTANT STEEL (TYPE 321) MS21921-4S NUT, .250 TUBING, CORROSION RESISTANT STEEL (TYPE 347) IS
20、CANCELLED, SEE TABLE 2 /D/ MS21921-4T NUT, .250 TUBING, TITANIUM ALLOY (6AL-4V) 9. PART MARKING: SEE PROCUREMENT SPECIFICATION. 10. DIMENSIONING AND TOLERANCING: ASME Y14.5M-1994. /11/ USE TAP DRILL DIA FOR K EXCEPT IN SIZES 20, 24 AND 32. 12. REFERENCED DOCUMENTS SHALL BE OF THE ISSUE IN EFFECT ON
21、DATE OF INVITATIONS FOR BID. 13. IN THE EVENT OF A CONFLICT BETWEEN THE TEXT OF THIS STANDARD AND THE REFERENCES CITED HEREIN, THE TEXT OF THIS STANDARD SHALL TAKE PRECEDENCE. /14/ PROCUREMENT SPECIFICATION: AS18280 EXCEPT AS SPECIFIED ON THIS STANDARD. PRODUCT SUPPLIED TO THIS SPECIFICATION SHALL B
22、E MANUFACTURED BY AN ACCREDITED MANUFACTURER LISTED IN THE PERFORMANCE REVIEW INSTITUTE (PRI) QUALIFIED PRODUCTS LIST (QPL) PRI-QPL-AS18280 FOR THIS STANDARD. SEE FOR CURRENT QPL ON-LINE. 15. A CHANGE BAR ( l ) LOCATED IN THE LEFT MARGIN IS FOR THE CONVENIENCE OF THE USER IN LOCATING AREAS WHERE TE
23、CHNICAL REVISIONS, NOT EDITORIAL CHANGES, HAVE BEEN MADE TO THE PREVIOUS ISSUE OF THIS DOCUMENT. AN (R) SYMBOL TO THE LEFT OF THE DOCUMENT TITLE INDICATES A COMPLETE REVISION OF THE DOCUMENT, INCLUDING TECHNICAL REVISIONS. CHANGE BARS AND (R) ARE NOT USED IN ORIGINAL PUBLICATIONS NOR IN DOCUMENTS TH
24、AT CONTAIN EDITORIAL CHANGES ONLY. 16. INTERPRETATION OF DRAWING PER ARP4296. AEROSPACE STANDARD AS21921 SHEET 4 OF 4 REV. C NUT, SLEEVE COUPLING, FLARELESS TABLE 2 CANCELLED, SUPERSEDED DOCUMENTS AND PART NUMBERS CANCELLED DOCUMENT NUMBER PART NUMBERS SUPERSESSION NOTES SUPERSEDING DOCUMENT NUMBER
25、SUPERSEDING PART NUMBERS MS21921 MS21921-(2 THRU 32) /A/ AS21921 MS21921V(2 THRU 32)P MS21921 MS21921-(2 THRU 32)C /B/ AS21921 MS21921-(2 THRU 32),J MS21921-(2 THRU 32)K, OR MS21921-(2 THRU 32)R MS21921 MS21921-(2 THRU 32)D /C/ AS21921 MS21921-(2 THRU 32)W MS21921 MS21921-(2 THRU 32)W NONE AS21921 M
26、S21921-(2 THRU 32)W MS21921 MS21921-(2 THRU 32)J NONE AS21921 MS21921-(2 THRU 32)J MS21921 MS21921-(2 THRU 32)K NONE AS21921 MS21921-(2 THRU 32)K MS21921 MS21921-(2 THRU 32)R NONE AS21921 MS21921-(2 THRU 32)R MS21921 MS21921-(2 THRU 32)S /D/ AS21921 MS21921-(2 THRU 32)R MS21921 MS21921-(2 THRU 32)T
27、NONE AS21921 MS21921-(2 THRU 32)T /A/ PARTS CODED “-” FOR 4130 ALLOY STEEL ARE NOT TO BE MANUFACTURED. PARTS CODED “V(SIZE)P” FOR CORROSION RESISTANT STEEL (15-5PH) WITH CADMIUM PLATE SHALL BE FURNISHED IN LIEU OF “-” CODED (4130) PARTS. PARTS CODED “-” FOR 4130 ALLOY STEEL MAY BE PROCURED UNTIL 12-
28、31-06. /B/ PARTS CODED “C” FOR CORROSION RESISTANT STEEL (TYPE 303) ARE NOT TO BE MANUFACTURED. PARTS CODED “J”, “K” OR “R” FOR CORROSION RESISTANT STEEL (TYPES 304, 316, OR 321, RESPECTIVELY) SHALL BE FURNISHED IN LIEU OF “C” CODED PARTS AT SUPPLIERS OPTION. /C/ PARTS CODED “D” FOR ALUMINUM ALLOY 2
29、024 ARE NOT TO BE MANUFACTURED. PARTS CODED “W” FOR ALUMINUM ALLOY 7075 SHALL BE FURNISHED IN LIEU OF 2024 (D CODE) PARTS. PARTS CODED “D” FOR ALUMINUM ALLOY 2024 MAY BE PROCURED UNTIL 12-31-06. /D/ PARTS CODED “S” FOR CORROSION RESISTANT STEEL (TYPE 347) ARE NOT TO BE MANUFACTURED. PARTS CODED “S” MAY BE USED UNTIL EXISTING STOCK IS DEPLETED. PARTS CODED “R” FOR CORROSION RESISTANT STEEL (TYPE 321) SHALL BE FURNISHED IN LIEU OF “S” CODED PARTS.
