1、_ SAE Technical Standards Board 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 there
2、from, 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. Copyright 2014 SAE International All rights reserved. No part of this p
3、ublication may be reproduced, stored in a retrieval system or transmitted, in any 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: +1 724-776-497
4、0 (outside USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/AIR6151B AEROSPACE INFORMATION REPORT AIR6151 REV. B Issued 2011-05 Revised 2014-
5、01 Superseding AIR6151A Torque, Threaded Application, Electrical Connector, Accessory and Terminal Board Installation RATIONALE To correct errors in the thread sizes listed in Table 2 for MIL-DTL-83723 series III connectors. 1. SCOPE This SAE Aerospace Information Report (AIR) is intended to provide
6、 guidelines to tightening methods and torque values as applied to electrical connectors, related hardware and switches, relays, circuit breakers and A-A-59125 type terminal boards. The connectors and associated hardware discussed herein, are typically manufactured from aluminum alloy, high grade eng
7、ineering thermoplastics or corrosion resistant steel and typically plated with a protective/conductive coating. These guidelines may be used where no rules have been mandated either contractually or otherwise. 1.1 Purpose To aid in the proper assembly of electrical connectors, related hardware and s
8、witches, relays, circuit breakers and A-A-59125 type terminal boards in order to avoid damage by over torque or the loosening of parts while in service. 2. REFERENCES 2.1 Applicable Documents The following publications form a part of this document to the extent specified herein. The latest issue of
9、SAE publications shall apply. The applicable issue of other publications shall be the issue in effect on the date of the purchase order. In the event of conflict between the text of this document and references cited herein, the text of this document takes precedence. Nothing in this document, howev
10、er, supersedes applicable laws and regulations unless a specific exemption has been obtained. 2.1.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org. AS1310 Faste
11、ner Torque for Threaded Applications, Definitions of AS50151 Connectors, Electrical, Circular Threaded, AN Type, General Specification For SAE INTERNATIONAL AIR6151B Page 2 of 14 AS81703 Connectors, Electric, Circular, Miniature, Rack and Panel or Push-Pull Coupling, Environment Resisting AS85049 Co
12、nnector Accessories, Electrical, General Specification for AS85049/1 Connector Accessories, Electrical, Backshell, Environmental, Cable Sealing, Straight, Grounding (Without Strain Relief), Category 1C (for AS50151 Solder Type, V Thread of AS310X Classes A, B, C or K Connectors) AS85049/2 Connector
13、Accessories, Electrical, Backshell, Environmental, Cable Sealing, Straight, Category 1C (for AS50151 Solder Type, V Thread of AS310X Classes A, B, C or K Connectors) AS85049/41 Connector Accessories, Electrical, Non-Environmental, Strain Relief, Straight, Category 4C (for AS50151 General Duty A Endb
14、ell and AS85049 Accessories) AS85049/42 Connector Accessories, Electrical, Nonenvironmental, Strain Relief, Straight, Category 4A (for AS50151 Solder Type, V Thread of AS310X Classes A, B, C or K Connectors) 2.1.2 U.S. Government Publications Available from DLA Document Services, Building 4/D, 700 R
15、obbins Avenue, Philadelphia, PA 19111-5094, Tel: 215-697-6396, http:/quicksearch.dla.mil/. Military MIL-DTL-22992 Connectors, Plugs and Receptacles, Electrical, Waterproof, Quick Disconnect, Heavy Duty Type, General Specification For MIL-DTL-26482 Connectors, Electrical (Circular, Miniature, Quick D
16、isconect, Environment Resisting) Receptacles and Plugs MIL-DTL-26500 Connectors, General Purpose, Electrical, Miniature, Circular, Environment Resisting, General Specification for MIL-DTL-27599 Connector, Electrical, Miniature, Quick Disconnect (for Weapons Systems), Established Reliability MIL-DTL-
17、28840 Connectors, Electrical, Circular, Threaded, High Density, High Shock, Shipboard, Class D, General specification for MIL-DTL-38999 Connectors, Electrical, Circular, Miniature, High Density, Quick Disconnect (Bayonet, Threaded, and Breech Coupling), Environment resistant, Removable Crimp and Her
18、metic Solder Contacts MIL-C-81511 Connectors, Electrical, Circular, High Density, Quick Disconnect, Environment Resisting and Accessories, General Specification For MIL-DTL-83723 Connectors, Electrical, Circular (Environment resisting) Receptacles and Plugs SAE INTERNATIONAL AIR6151B Page 3 of 14 2.
19、2 Definitions 2.2.1 TORQUE Torque is the result of force times radius. Typically measured in units of inch-ounces, inch-pounds, foot-pounds, Newton-meters, kilogram-centimeters, etc. (see 3.1 and Table 6). 2.2.2 APPLIED TORQUE The torque transmitted to the thread by the installation tool. 2.2.3 ASSE
20、MBLY SEQUENCE A method indicating sequence of assembling fasteners in a prescribed pattern. Also; Installation Sequence, Tightening Sequence, Torquing Sequence. 2.2.4 ASSEMBLY TORQUE This shall be the design torque applied at final assembly. It shall include the net effect of the following; a. The t
21、orque required to overcome kinetic friction between mating bearing faces and between mating threads. b. The torque required to overcome the self-locking feature (if any). c. The torque required to apply the desired axial load to a fastener assembly. 2.2.5 BREAKAWAY TORQUE This is the torque required
22、 to initiate relative motion between male and female threads. Breakaway torque can be prefixed with the words maximum or minimum and shall only be measured in the loosening direction. 2.2.6 OVER TORQUE This shall be the torque required to initially move the wrenched thread from the installed conditi
23、on. Over torque is always measured in the tightening direction and exceeds the maximum limit of the desired installation torque. Also: Over Tightening Torque. 2.2.7 PREVAILING TORQUE This shall be the torque required to overcome kinetic friction of mating threads plus the torque required to overcome
24、 the locking feature when 100% of the locking feature is engaged and the threads are unseated. The word “prevailing“ shall be understood as the average torque when it is not prefixed by the words maximum or minimum. The prevailing torque can be measured in either a loosening or tightening direction.
25、 Also: Run Down Torque/ Running Torque. 2.2.8 SINGLE TORQUE This shall be the installation torque applied once per assembly, usually applied to freely fitting parts, where no interference fits to hinder the seating of mating parts. 2.2.9 TORQUE OUT This term refers to a general type of torsional fai
26、lure where any fastener component reacting to the applied torque, disengages or fails. This term is also used when referring to other types of torquing elements such as interference fits. SAE INTERNATIONAL AIR6151B Page 4 of 14 2.2.10 UNSEATING TORQUE This shall be the torque required to initially m
27、ove the fastener from the installation torque condition. The unseating torque shall always be measured in a loosening direction. Also: Breakaway Torque. 3. REQUIREMENTS 3.1 General Torque is the force or turning moment tending to produce rotation. It is expressed in terms of applied load and the len
28、gth of the moment arm applying it in inch-pounds (in-lb). The torques specified herein are those commonly used in the aerospace industry and do not represent thread strength values for qualification testing. It is the responsibility of the user/installer to determine the best torque for the applicat
29、ion and to select the appropriate tools and holding devices for the work and the user conditions. It should be noted that the included torque definitions apply equally to both internal and external threaded parts that may or may not have a locking feature. For all the following torque definitions, t
30、he threaded components shall be considered; a. Seated when its bearing surface contacts the material being joined and any additional applied torque will produce a residual axial stress in either the male or female component. b. Unseated when the application of removal torque disengages the bearing s
31、urface of the threaded component from the material being joined, reducing the axial stress to zero. 3.2 Material Torque requirements specified herein shall apply to threaded component such as couplings, nuts, screws, bolts, studs and inserts. These items may be separate hardware or integral parts of
32、 such components as connectors, backshells or clamps. They will usually be made of corrosion-resistant steel, high grade engineering thermoplastic or aluminum alloy coated with a protective coating. Threads may be locked by lockwashers, self-locking inserts, anti decoupling devices or liquid locking
33、 componds. Threads that are locked by deformed metal threads in inserts or contain a material compound that provides a locking feature may be coated with a thread lubricant. 3.3 Temperature Effects For ambient temperatures outside the range of -1 to 93 C (30 to 200 F) allowance must be made for mech
34、anical property differences from tabulated room temperatue values. These properties include tensile strength, yield strength, modulus of elasticity, etc. Where bolts and flange materials are generically dissimilar, such as aluminum and corrosion resistant steel or steel and brass, differences in the
35、rmal expansion may cause preload increase or decrease with temperature. Allowance must be made for these changes. 4. TORQUE REQUIREMENTS 4.1 Screw Torque Recommended torque for corrosion resistant or plated steel screws is listed in Table 1. Column 1 is for standard installation into aluminum or cor
36、rosion resistant steel. Column 2 is for installation into composite material regardless of thread length or aluminum material with less than 3 full threads of engagement. Column 3 is for installation in high vibration (engine) areas, clinch nuts and ground straps. SAE INTERNATIONAL AIR6151B Page 5 o
37、f 14 TABLE 1 - CORROSION RESISTANT/PLATED STEEL SCREW TORQUE/IN-LB Screw Column 1 Column 2 Column 3 Size Min/Max Min/Max Min/Max 2-56 1.5/2.5 1.2/2.0 2.0/2.5 4-40 3.5/4.5 2.8/3.6 3.5/4.5 6-32 5.0/7.0 4.0/5.6 5.5/6.5 8-32 7.0/9.0 5.6/7.2 7.5/8.5 10-32 9.0/11.0 7.2/8.8 8.5/10.5 .250-20 11.0/13.0 8.8/1
38、0.4 10.5/15.5 4.2 Connector Receptacle Jam Nut Torque Recommended torque for aluminum, composite and corrosion resistant steel connector jam nuts are listed in Table 2. TABLE 2 - CONNECTOR RECEPTACLE JAM NUT TORQUE/IN-LB Thread Size Torque Min/Max Connector Shell Size Reference AS50151 MIL-DTL-26482
39、 MIL-DTL-26500 MIL-DTL-83723 Series I .500-28UNEF-2B 24/30 8S .562-24UNEF-2B 26/32 8 8 .625-24UNEF-2B 28/34 10S - 10SL .625-20UN-2B 28/34 8 .687-24UNEF-2B 30/36 10 10 .750-20UNEF-2B 34/40 12 - 12S 10 .875-20UNEF-2B 46/50 14 - 14S 12 12 .937-20UNEF-2B 50/55 12 1.000-20UNEF-2B 55/60 16 - 16S 14 14 14
40、1.125-20UN-2B 70/75 16 1.125-18UNEF-2B 70/75 18 16 16 1.250-20UN-2B 80/85 18 18 1.250-18UNEF-2B 80/85 20 18 1.375-18UNEF-2B 90/95 22 20 20 20 1.500-20UN-2B 105/115 22 1.500-18UNEF-2B 105/115 24 22 22 1.625-18UNEF-2B 110/120 24 24 24 1.750-18UNS-2B 120/130 28 2.000-18UNS-2B 150/160 32 2.250-16UN-2B 1
41、70/180 36 2.500-16UN-2B 200/210 40 2.750-16UN-2B 220/230 44 3.000-16UN-2B 240/250 48 SAE INTERNATIONAL AIR6151B Page 6 of 14 TABLE 2 - CONNECTOR RECEPTACLE JAM NUT TORQUE/IN-LB (CONTINUED) Thread Size Torque Min/Max Connector Shell Size Reference MIL-DTL-83723 Ser. III MIL-DTL-38999 Ser. I MIL-DTL-3
42、8999 Ser. II .625-20UN-2B 28/34 8 9 .750-20UNEF-2B 34/40 10 11 .812-20UNEF-2B 40/46 8 .937-20UNEF-2B 50/55 12 13 10 1.000-20UNEF-2B 55/60 14 1.125-18UNEF-2B 70/75 16 1.125-20UN-2B 70/75 15 12 1.250-20UN-2B 80/85 17 14 1.250-18UNEF-2B 80/85 18 19 16 1.375-18UNEF-2B 90/95 20 1.500-20UN-2B 105/115 21 1
43、8 1.500-18UNEF-2B 105/115 22 23 20 1.625-18UNEF-2B 110/120 24 25 22 1.750-18UNS-2B 120/130 24 TABLE 2 - CONNECTOR RECEPTACLE JAM NUT TORQUE/IN-LB (CONTINUED) Thread Size Torque Min/Max Connector Shell Size Reference MIL-DTL-28840MIL-PRF-28876 MIL-DTL-27599 MIL-DTL-38999 Series III MIL-DTL-38999 Seri
44、es IV .687-24UNEF-2B 30/36 9 .750-20UNEF-2B 34/40 .812-20UNEF-2B 40/46 11 .875-20UNEF-2B 46/50 11 8 .937-20UNEF-2B 50/55 1.000-20UNEF-2B 55/60 13 10 AS50151 (AS31001 Series) MIL-DTL-26482 Series 1 MIL-DTL-26500 MIL-DTL-27599 MIL-DTL-38999 Series I and II MIL-C-81511 Series 1, 2, 3, 4 AS81703 Series
45、1 Column 2 is for aluminum heavy duty accessories including connector series; AS50151 (AS34001 Series) MIL-DTL-22992 MIL-DTL-26482 Series 2 MIL-DTL-28840 MIL-DTL-38999 Series III and IV AS81703 Series 3 MIL-DTL-83723 Series I, II, III Column 3 is for accessories with composite (high grade engineerin
46、g thermoplastic) material coupling threads. Column 4 is for accessories with aluminum coupling threads used in high vibration (engine) applications. Column 5 is for accessories with corrosion resistant steel coupling threads used in high vibration (engine) applications. TABLE 4 - CONNECTOR ACCESSORY
47、 TORQUE/IN-LB Connector Shell Sizes Column 1 Column 2 Column 3 Column 4 Column 5 Min/Max Min/Max Min/Max Min/Max Min/Max 8,9,A 30/40 51/61 20/25 66-77 91-101 3,10,10SL, 11, B 30/40 71/81 20/30 103-113 115-125 7,12,12S,13,C 35/45 103/113 25/35 115-125 115-125 14,14S,15,D 35/45 111/121 25/35 139-149 1
48、39-149 16,16S,17,E 35/45 111/121 30/40 139-149 139-149 18,19,27,F 35/45 111/121 30/40 139-149 175-185 20,21,37,G 75/85 131/141 35/45 175-185 199-209 22,23,H 75/85 131/141 35/45 175-185 223-233 24,25,61,J 75/85 131/141 35/45 175-185 259-269 28,29 115/125 143/153 115/125 187-197 307-317 32,33 115/125
49、143/153 36 115/125 142/153 40 155/165 159/169 44 155/165 159/169 48 155/165 159/169 SAE INTERNATIONAL AIR6151B Page 9 of 14 4.5 Connector to Connector (Plug to Receptacle) Coupling Torque Recommended torques for coupling threaded plug and receptacle connectors are shown in Table 5. TABLE 5 CONNECTOR TO CONNECTOR TORQUE/IN-LB Connector
