1、AEROSPACE STANDARDREDUCER, EXTERNAL THREAD, FLARELESS TUBEAS21916Copyright 2016 SAE InternationalAll 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: +1 724-776-4970 (outside USA)Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.orgISSUED1998-03REAFFIRMED 2007-07REVISED2016-10THIRD ANGLE PROJECTIONCU
3、STODIAN: G-3/G-3BREV. FFEDERAL SUPPLY CLASS4730AS21916SHEET 1 OF 5REV.FPROCUREMENT SPECIFICATION: AS18280 /10/SAE Technical Standards BoardRules providethat:“This reportis publishedby SAE to advance thestateoftechnical andengineering sciences. The useofthis reportis entirely voluntary, and its appli
4、cability and suitability forany particularuse, includingany patent infringement arising therefrom,is thesole responsibility of theuser.”SAE reviews eachtechnical reportatleastevery five years at whichtime it may berevised, reaffirmed, stabilized, or cancelled. SAEinvitesyour written comments and sug
5、gestions.SAE values your input. To provide feedback on thisTechnical Report, please visit http:/standards.sae.org/AS21916FRATIONALECORRECT TYPO ERROR TO DIMENSION “E” FOR -6 HEX SIZES IN TABLE 1A.NOTICETHE INITIAL SAE PUBLICATION OF THIS DOCUMENT WAS TAKEN DIRECTLY FROM U.S. MILITARY STANDARD MS2191
6、6. THIS SAE STANDARD MAY RETAIN THE SAME PART NUMBERS ESTABLISHED BY THE ORIGINAL MILITARY DOCUMENT.ANY REQUIREMENTS ASSOCIATED WITH QUALIFIED PRODUCTS LISTS (QPLS) MAY CONTINUE TO BE MANDATORY FOR DOD CONTRACTS. REQUIREMENTS RELATING TO QPLS HAVE NOT BEEN ADOPTED BY THE SAE FOR THIS STANDARD AND AR
7、E NOT PART OF THIS SAE DOCUMENT.FIGURE 1 - REDUCER, EXTERNAL THREAD, FLARELESS TUBEEAEROSPACE STANDARD AS21916SHEET 2 OF 5REV.FREDUCER, EXTERNAL THREAD, FLARELESS TUBETABLE 1A - DIMENSION EDASHNO./5/LARGE END SMALL ENDEMIN MAXNOMINALTUBESIZEREF(T) THREADAS8879NOMINALTUBESIZEREF(R) THREADAS8879-3-2 .
8、188 .3750-24 UNJF-3A .125 .3125-24 UNJF-3A .615 - .628-4-2 .250 .4375-20 UNJF-3A .125 .3125-24 UNJF-3A .678 - .691-4-3 .250 .4375-20 UNJF-3A .188 .3750-24 UNJF-3A .678 - .691-5-4 .313 .5000-20 UNJF-3A .250 .4375-20 UNJF-3A .740 - .753-6-2 .375 .5625-18 UNJF-3A .125 .3125-24 UNJF-3A .803 - .816-6-3 .
9、375 .5625-18 UNJF-3A .188 .3750-24 UNJF-3A .803 - .816-6-4 .375 .5625-18 UNJF-3A .250 .4375-20 UNJF-3A .803 - .816-6-5 .375 .5625-18 UNJF-3A .313 .5000-20 UNJF-3A .803 - .816-8-2 .500 .7500-16 UNJF-3A .125 .3125-24 UNJF-3A .990 - 1.003-8-3 .500 .7500-16 UNJF-3A .188 .3750-24 UNJF-3A .990 - 1.003-8-4
10、 .500 .7500-16 UNJF-3A .250 .4375-20 UNJF-3A .990 - 1.003-8-5 .500 .7500-16 UNJF-3A .313 .5000-20 UNJF-3A .990 - 1.003-8-6 .500 .7500-16 UNJF-3A .375 .5625-18 UNJF-3A .990 - 1.003-10-4 .625 .8750-14 UNJF-3A .250 .4375-20 UNJF-3A 1.113 - 1.128-10-6 .625 .8750-14 UNJF-3A .375 .5625-18 UNJF-3A 1.113 -
11、1.128-10-8 .625 .8750-14 UNJF-3A .500 .7500-16 UNJF-3A 1.113 - 1.128-12-4 .750 1.0625-12 UNJ-3A .250 .4375-20 UNJF-3A 1.363 - 1.380-12-5 .750 1.0625-12 UNJ-3A .313 .5000-20 UNJF-3A 1.363 - 1.380-12-6 .750 1.0625-12 UNJ-3A .375 .5625-18 UNJF-3A 1.363 - 1.380-12-8 .750 1.0625-12 UNJ-3A .500 .7500-16 U
12、NJF-3A 1.363 - 1.380-12-10 .750 1.0625-12 UNJ-3A .625 .8750-14 UNJF-3A 1.363 - 1.380-16-4 1.000 1.3125-12 UNJ-3A .250 .4375-20 UNJF-3A 1.613 - 1.630-16-10 1.000 1.3125-12 UNJ-3A .625 .8750-14 UNJF-3A 1.613 - 1.630-16-12 1.000 1.3125-12 UNJ-3A .750 1.0625-12 UNJ-3A 1.613 - 1.630-20-4 1.250 1.6250-12
13、UNJ-3A .250 .4375-20 UNJF-3A 1.863 - 1.880-20-12 1.250 1.6250-12 UNJ-3A .750 1.0625-12 UNJ-3A 1.863 - 1.880-20-16 1.250 1.6250-12 UNJ-3A 1.000 1.3125-12 UNJ-3A 1.863 - 1.880-24-16 1.500 1.8750-12 UNJ-3A 1.000 1.3125-12 UNJ-3A 2.109 - 2.135-24-20 1.500 1.8750-12 UNJ-3A 1.250 1.6250-12 UNJ-3A 2.109 -
14、2.135AEROSPACE STANDARD AS21916SHEET 3 OF 5REV.FREDUCER, EXTERNAL THREAD, FLARELESS TUBETABLE 1B - DIMENSIONS K-SDASHNO./5/K.010DIA NS.031WEIGHT, LB/EA, APPROX, REF.STEELALALLOYTIALLOY-3-2 .611 1.047 .547 .036 .014 .020-4-2 .674 1.094 .594 .042 .016 .024-4-3 .674 1.141 .594 .046 .017 .026-5-4 .736 1
15、.156 .563 .065 .019 .037-6-2 .799 1.156 .625 .066 .021 .038-6-3 .799 1.203 .625 .067 .023 .038-6-4 .799 1.219 .625 .068 .024 .039-6-5 .799 1.219 .625 .070 .025 .040-8-2 .985 1.250 .719 .101 .037 .058-8-3 .985 1.297 .719 .108 .038 .062-8-4 .985 1.344 .719 .115 .039 .066-8-5 .985 1.344 .719 .118 .040
16、.068-8-6 .985 1.344 .719 .120 .042 .069-10-4 1.111 1.438 .781 .155 .053 .089-10-6 1.111 1.625 .781 .204 .072 .117-10-8 1.111 1.531 .781 .222 .081 .128-12-4 1.361 1.531 .875 .230 .084 .132-12-5 1.361 1.531 .875 .235 .086 .135-12-6 1.361 1.531 .875 .240 .088 .138-12-8 1.361 1.625 .844 .250 .090 .144-1
17、2-10 1.361 1.688 .875 .260 .098 .150-16-4 1.599 1.531 .688 .327 .120 .188-16-10 1.599 1.688 .875 .335 .115 .193-16-12 1.599 1.750 .875 .342 .122 .197-20-4 1.849 1.531 .719 .439 .162 .253-20-12 1.849 1.813 .906 .485 .172 .219-20-16 1.849 1.750 .875 .450 .165 .259-24-16 2.095 1.750 .875 .525 .193 .302
18、-24-20 2.095 1.750 .875 .570 .209 .328NOTESNOTICETHIS DOCUMENT REFERENCES A PART WHICH CONTAINS CADMIUM AS PLATING MATERIAL. CONSULT LOCAL OFFICIALS IF YOU HAVE QUESTIONS CONCERNING CADMIUMS USE.1. MATERIAL:SEE PROCUREMENT SPECIFICATION.ALLOY STEELALUMINUM ALLOYCORROSION RESISTANT STEELTITANIUM ALLO
19、Y2. FINISH: SEE PROCUREMENT SPECIFICATION.AEROSPACE STANDARD AS21916SHEET 4 OF 5REV.FREDUCER, EXTERNAL THREAD, FLARELESS TUBE3. BREAK EDGES .003 TO .015 UNLESS OTHERWISE SPECIFIED.4. DIMENSIONS ARE IN INCHES. UNLESS OTHERWISE SPECIFIED, TOLERANCES: DECIMALS .016, ANGLES 030./5/ PART NUMBERS:MATERIAL
20、 CODE DASH “-” IN PART NUMBER FOR 4130 ALLOY STEEL.ADD MATERIAL CODE “V (SIZE) P” IN PLACE OF DASH FOR CORROSION RESISTANT STEEL (15-5PH), CADMIUM PLATED.ADD MATERIAL CODE “V” IN PLACE OF DASH FOR CORROSION RESISTANT STEEL (15-5PH), NOT CADMIUM PLATED.ADD MATERIAL CODE “D” IN PLACE OF DASH FOR ALUMI
21、NUM ALLOY (2024).ADD MATERIAL CODE “W” IN PLACE OF DASH FOR ALUMINUM ALLOY (7075).ADD MATERIAL CODE “J” IN PLACE OF DASH FOR CORROSION RESISTANT STEEL (TYPE 304).ADD MATERIAL CODE “K” IN PLACE OF DASH FOR CORROSION RESISTANT STEEL (TYPE 316).ADD MATERIAL CODE “R” AFTER DASH NUMBER FOR CORROSION RESI
22、STANT STEEL (TYPE 321).ADD MATERIAL CODE “S” AFTER DASH NUMBER FOR CORROSION RESISTANT STEEL (TYPE 347). (INACTIVE)ADD MATERIAL CODE “T” AFTER DASH NUMBER FOR TITANIUM ALLOY (6AL-4V).EXAMPLES OF PART NUMBERS:MS21916-8-4 REDUCER, .500 TUBING TO .250 TUBING, 4130 ALLOY STEEL.MS21916V8-4P REDUCER, .500
23、 TUBING TO .250 TUBING, CORROSION RESISTANT STEEL (15-5PH), CADMIUM PLATED. SEE TABLE 2 /A/MS21916V8-4 REDUCER, .500 TUBING TO .250 TUBING, CORROSION RESISTANT STEEL (15-5PH), NOT CADMIUM PLATEDMS21916D8-4 REDUCER, .500 TUBING TO .250 TUBING, ALUMINUM ALLOY (2024). SEE TABLE 2 /C/MS21916W8-4 REDUCER
24、, .500 TUBING TO .250 TUBING, ALUMINUM ALLOY (7075)MS21916J8-4 REDUCER, .500 TUBING TO .250 TUBING, CORROSION RESISTANT STEEL (TYPE 304)MS21916K8-4 REDUCER, .500 TUBING TO .250 TUBING, CORROSION RESISTANT STEEL (TYPE 316)MS21916-8-4R REDUCER, .500 TUBING TO .250 TUBING, CORROSION RESISTANT STEEL (TY
25、PE 321)MS21916-8-4S REDUCER, .500 TUBING TO .250 TUBING, CORROSION RESISTANT STEEL (TYPE 347) (REPLACED)SEE TABLE 2 /D/MS21916-8-4T REDUCER, .500 TUBING TO .250 TUBING, TITANIUM ALLOY (6AL-4V)6. PART MARKING: SEE PROCUREMENT SPECIFICATION.7. DIMENSIONING AND TOLERANCING: ASME Y14.5M-1994.8. REFERENC
26、ED DOCUMENTS SHALL BE OF THE ISSUE IN EFFECT ON DATE OF INVITATIONS FOR BID.9. 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./10/ PROCUREMENT SPECIFICATION: AS18280 EXCEPT AS SPECIFIED ON THIS STANDARD. P
27、RODUCT SUPPLIED TO THIS SPECIFICATION SHALL BE MANUFACTURED BY AN ACCREDITED MANUFACTURER LISTED IN THE PERFORMANCE REVIEW INSTITUTE (PRI) QUALIFIED PRODUCTS LIST (QPL) PRI-QPL-AS18280 FOR THIS STANDARD. SEE www.eAuditN FOR CURRENT QPL ON-LINE.11. SURFACE TEXTURE: SYMBOLS PER ASME Y14.36M; REQUIREME
28、NTS PER ASME B46.1; UNLESS OTHERWISE SPECIFIED MACHINEDSURFACES SHALL BE 125 Ra.12. REVISION INDICATOR: A CHANGE BAR (I) LOCATED IN THE LEFT MARGIN IS FOR THE CONVENIENCE OF THE USER IN LOCATING AREAS WHERE TECHNICAL REVISIONS, NOT EDITORIAL CHANGES, HAVE BEEN MADE TO THE PREVIOUS ISSUE OF THIS DOCU
29、MENT. 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 THAT CONTAIN EDITORIAL CHANGES ONLY.13. INTERPRETATION OF DRAWING PER AS4296.14. FLUID PASSA
30、GE, HOLE CONTOUR: AS4266 (OPTIONAL).15. INVENTORIED PARTS CONFORMING TO THE PREVIOUS LETTER CHANGE MAY BE USED TO DEPLETION.AEROSPACE STANDARD AS21916SHEET 5 OF 5REV.FREDUCER, EXTERNAL THREAD, FLARELESS TUBETABLE 2 - CANCELLED, SUPERSEDING DOCUMENT AND PART NUMBERSCANCELLEDDOCUMENTNUMBEROLD PARTNUMB
31、ERSSUPERSEDINGDOCUMENTNUMBERRETAINEDMIL-F-18280PART NUMBERSCURRENTAS18280PART NUMBERSMS21916 MS21916-(3-2 THRU 24-20) AS21916 MS21916-(3-2 THRU 24-20)MS21916 MS21916-(3-2 THRU 24-20) AS21916 /A/ MS21916V(3-2 THRU 24-20)PMS21916 MS21916C(3-2 THRU 24-20) AS21916 /B/ MS21916J(3-2 THRU 24-20)MS21916 MS2
32、1916C(3-2 THRU 24-20) AS21916 /B/ MS21916K(3-2 THRU 24-20)MS21916 MS21916C(3-2 THRU 24-20) AS21916 /B/ MS21916-(3-2 THRU 24-20)RMS21916 MS21916D(3-2 THRU 24-20) AS21916 MS21916D(3-2 THRU 24-20)MS21916 MS21916D(3-2 THRU 24-20) AS21916 /C/ MS21916W(3-2 THRU 24-20)MS21916 MS21916W(3-2 THRU 24-20) AS219
33、16 MS21916W(3-2 THRU 24-20)MS21916 MS21916J(3-2 THRU 24-20) AS21916 MS21916J(3-2 THRU 24-20)MS21916 MS21916K(3-2 THRU 24-20) AS21916 MS21916K(3-2 THRU 24-20)MS21916 MS21916-(3-2 THRU 24-20)R AS21916 MS21916-(3-2 THRU 24-20)RMS21916 MS21916-(3-2 THRU 24-20)S AS21916 /D/ MS21916-(3-2 THRU 24-20)RMS219
34、16 MS21916-(3-2 THRU 24-20)T AS21916 MS21916-(3-2 THRU 24-20)T16. EXPLANATORY NOTES:/A/ MATERIAL CODE “V (SIZE) P” FOR CADMIUM PLATED 15-5PH CORROSION RESISTANT STEEL IS RECOMMENDED AS A REPLACEMENT FOR MATERIAL CODE DASH “-” WHEN HIGH STRENGTH MATERIAL IS NEEDED./B/ MATERIAL CODE “C” FOR CORROSION
35、RESISTANT STEEL (TYPE 303) IS REPLACED BY MATERIAL CODES “J”, “K”, OR “R” FOR CORROSION RESISTANT STEEL (TYPE 304, TYPE 316, OR TYPE 321). (INACTIVATED ON MS21900 SERIES STANDARDS 27 JUNE 1969). /C/ MATERIAL CODE “W” FOR ALUMINUM ALLOY 7075 IS RECOMMENDED AS A REPLACEMENT FOR MATERIAL CODE “D” IN HYDRAULIC APPLICATIONS WHERE HIGHER STRENGTH PROPERTIES AND SUPERIOR CORROSION RESISTANCE IS REQUIRED./D/ MATERIAL CODE “S” FOR CORROSION RESISTANT STEEL (TYPE 347) IS REPLACED BY MATERIAL CODE “R” FOR CORROSION RESISTANT STEEL (TYPE 321). (BY MIL-F-18280E DATED 11 MAY 1987).
