SAE AS18121B-2025 屏蔽电缆用外绝缘屏蔽端接套管 II型两件式 I级

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AEROSPACE STANDARD

(R) FERRULES, OUTER, INSULATED, SHIELD

TERMINATING, TYPE II TWO-PIECE, CLASS I,

FOR SHIELDED CABLE

AS18121™

or otherwise, or used for text and data mining, AI training, or similar technologies, without the prior written permission of SAE.

TO PLACE A DOCUMENT ORDER: Tel: 1-877-606-7323 (U.S. and Canada only) Tel: 1-724-776-4970 (outside U.S. and Canada)

Fax: 724-776-0790 Email: CustomerService@sae.org SAE WEB ADDRESS: http://www.sae.org

ISSUED 1999-07 REVISED 2021-01 REAFFIRMED 2025-10

THIRD ANGLE PROJECTION

CUSTODIAN: AE-8C2

REV.

FEDERAL SUPPLY CLASS

5940

AS18121™

SHEET 1 OF 3

REV.

PROCUREMENT SPECIFICATION: AS21608

SAE Executive Standards Committee Rules provide that: “ This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is

entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefrom, is the sole responsibility of the user.”

SAE reviews each technical report at least every five years at which time it may be revised, reaffirmed, stabilized, or cancelled. SAE invites your written comments and suggestions.

For more information on this standard, visit

https://www.sae.org/standards/content/AS18121B/

RATIONALE

REVISION REQUIRED TO ADD APPLICATION INFORMATION AND MINOR TECHNICAL CHANGES.

AS18121B HAS BEEN REAFFIRMED TO COMPLY WITH THE SAE FIVE-YEAR REVIEW POLICY.

NOTICE

THE COMPLETE REQUIREMENTS FOR PROCURING THE PRODUCT DESCRIBED HEREIN SHALL CONSIST OF THIS

DOCUMENT AND THE LATEST ISSUE OF AS21608.

FIGURE 1 - FERRULE

REQUIREMENTS: ALL REQUIREMENTS SHALL CONSIST OF THIS DOCUMENT AND THE LATEST ISSUE OF AS21608.

1. MATERIAL:

 METAL BARREL MATERIAL SHALL BE COPPER OR BRASS ALLOY. ROCKWELL F65 MAXIMUM.

 FINISH SHALL BE TIN PLATE IN ACCORDANCE WITH ASTM B545 OR ASTM B339.

 INSULATING SLEEVE MATERIAL SHALL BE NYLON IN ACCORDANCE WITH ASTM D4066.

2. CONFIGURATION:

 DIMENSIONS IN INCHES SHALL BE IN ACCORDANCE WITH TABLE 1 AND FIGURE 1.

 SLEEVE COLOR SHALL BE IN ACCORDANCE WITH TABLE 1.

 REMOVE ALL BURRS AND SHARP EDGES. CHAMFER OR ROUND EDGES IS ACCEPTABLE.

3. MARKING:

 SLEEVES SHALL BE COLOR CODED IN ACCORDANCE WITH TABLE 1.

 SUPPLIER NAME OR SYMBOL IN ACCORDANCE WITH AIR1351 AND PART NUMBER SHALL BE ON UNIT

PACKAGING.

AEROSPACE STANDARD

AS18121™

SHEET 2 OF 3

REV.

(R) FERRULES, OUTER, INSULATED, SHIELD

TERMINATING, TYPE II TWO-PIECE, CLASS I,

FOR SHIELDED CABLE

4. PART NUMBER:

MS18121 -128

FERRULE DASH NUMBER (SEE TABLE 1)

MS PART NUMBER PREFIX AND AS18121 DETAIL SPECIFICATION NUMBER

5. CRIMP TOOLS:

 SUPPLIER SHALL MAKE AVAILABLE TO THE USER COMPLETE DETAILS OF THE TOOLS REQUIRED FOR TERMINATION OF

FERRULE.

 CRIMP TOOL SHALL BE AS22520/5 DIES AS SPECIFIED IN TABLE 1.

 IF CLASS II TOOLS ARE USED (QUALIFICATION CERTIFICATION IS REQUIRED).

TABLE 1 - CONFIGURATION

DASH

NUMBER

MS18121-

SLEEVE

COLOR

±.025

±.015

±.005

±.025

CRIMP DIE DASH

NUMBER

M22520/5-

DIE CLOSURE

POSITION

101 NONE 1/ .177 .128 .101 .152 35 B

128 BLUE .205 .149 .128 .182 37 B

149 PURPLE .244 .175 .149 .219 41 B

156 YELLOW .260 .184 .156 .233 43 B

175 BLUE .283 .206 .175 .255 19 B

187 ORANGE .299 .218 .187 .270 45 A

194 RED .298 .223 .194 .270 45 A

199 NONE 1/ .305 .229 .199 .275 45 A

205 YELLOW .315 .236 .205 .285 19 A

219 GREEN .320 .247 .219 .293 19 A

225 PURPLE .336 .253 .225 .302 19 A

232 ORANGE .343 .260 .23 .314 43 A

261 YELLOW .377 .292 .261 .347 41 A

275 NONE 1/ .396 .316 .275 .356 39 A

281 PURPLE .414 .322 .281 .374 35 A

287 BLUE .410 .325 .287 .372 35 A

297 GREEN .418 .340 .297 .376 35 A

312 YELLOW .454 .353 .312 .409 47 A

327 NONE 1/ .476 .368 .327 ..436 23 A

348 ORANGE .483 .389 .348 .453 23 A

359 PURPLE .492 .397 .359 .454 23 A

375 YELLOW .499 .416 .375 .459 49 A

405 RED .553 .446 .405 .513 51 A

415 BLUE .558 .456 .415 .518 51 A

460 NONE 1/ .604 .501 .460 .568 51 A

500 GREEN 640 .541 .500 .620 27 A

1/ NO COLOR ADDED TO THE SLEEVE

6. QUALIFICATION:

 QUALIFICATION NOT REQUIRED. QUALITY CONFORMANCE DATA IS REQUIRED TO BE SUBMITTED WITH EACH

PROCUREMENT UNLESS WAIVED BY THE PURCHASER.

AEROSPACE STANDARD

AS18121™

SHEET 3 OF 3

REV.

(R) FERRULES, OUTER, INSULATED, SHIELD

TERMINATING, TYPE II TWO-PIECE, CLASS I,

FOR SHIELDED CABLE

7. APPLICATIONS:

 AS18121 OUTER FERRULES ARE USED WITH AS21981 INNER FERRULES AS AN INSULATED REPLACEMENT. THE SAME

SIZE INNER CRIMP FERRULE (AS21981) IS USED WITH EITHER INSULATED OUTER CRIMP FERRULE (AS18121) OR UN-

INSULATED OUTER (AS21980) OF THE SAME DASH NUMBER. AS21980 OUTER FERRULE CRIMPING TOOL AND DIE

COMBINATION ARE IN ACCORDANCE WITH TABLE 1.

 AS18121 FERRULES ARE ASSEMBLED IN ACCORDANCE ARP7503.

 INSULATED FERRULES SHOULD NOT BE EXPOSED TO TEMPERATURES ABOVE THE FERRULE’S INSULATION

TEMPERATURE RATING.

 AS18121 DOES NOT RESTRICT THE USE OF PURE TIN FINISHES WHICH MAY CAUSE TIN WHISKER GROWTH. FOR

MORE INFORMATION ON TIN WHISKERS (REFER TO GEIA-STD-0005-2).

 FOR ENVIRONMENTAL PROTECTION SHIELD GROUNDING, REFER TO AS83519.

8. SUPERSESSION:

 MS21981 WAS CANCELLED AND SUPERSEDED WITH AS21981. PART NUMBER REMAINS UNCHANGED.

 THE MS25311 MILITARY PART NUMBERS ARE SUPERSEDED BY MS21981 AND MS18121 PART NUMBERS AS

INDICATED IN TABLE 2.

TABLE 2 - MS18121 PART NUMBER SUPERSESSION

SUPERSEDED

MS25311

ONE-PIECE

FERRULE

DASH

NO.

REPLACED BY TWO-PIECE

COMBINATION (REF)

MS21981

INNER

FERRULE

DASH NO.

MS18121

OUTER

FERRULE

DASH NO.

-90 -058 -128, -149, -156

-100 -063 -156, -175

-110 -080 -156, -175, -187

-120 -101 -187, -194, -199

-130 -115 -199, -205, -219

-150 -134 -225, -232, -261

-160 -156 -232, -261, -275

-180 -175, -187 -287, -297

-200 -205, -219 -312, -327, -348

SPECIFICATION NOTES:

1. REVISION INDICATOR: A CHANGE BAR (|) 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 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 THAT CONTAIN EDITORIAL CHANGES ONLY.

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标签： #管

摘要：

SAE AS18121B-2025标准规范了II型两件式、I级屏蔽端接套管的性能与设计要求，用于航空与航天领域中屏蔽电缆的外绝缘屏蔽层端接。该新型号套管通过两件式结构实现可靠的电连接与机械固定，适用于高可靠性信号传输或电力通路中的屏蔽终端处理，确保在严苛环境下的抗干扰、防腐蚀与电磁兼容性。全文聚焦于端接套管的材料、尺寸、镀覆工艺及测试方法，覆盖从-55℃至+200℃的工作温度范围，适用于需符合SAE国际航空航天标准的装配与维修场景，助力提升电缆组件的长期稳定性及系统安全等级。

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SAE AS18121B-2025 屏蔽电缆用外绝缘屏蔽端接套管 II型两件式 I级

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