1、This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2016 by Navistar, Inc. APRIL 2016 Page 1 of 15 NAVISTAR, INC. Material, Parts, and Process Specifications
2、 (MPAPS) NUMBER: MPAPS F-0 Former Designation: CEMS F-0 TITLE: Fastener Torque Requirements CURRENT Rev. No.: 1604 DATE: April. 2016 WRITTEN/REVIEWED BY: W. Cook APPROVED BY: R. Goluch SUPERSEDES: Rev. 1512 December 2015 PRINTED COPIES OF THIS DOCUMENT MUST BE VERIFIED FOR CURRENT REVISION This spec
3、ification may involve hazardous materials, equipment, and procedures. This specification does not purport to address all of the safety issues associated with its use. The user is responsible to consult appropriate safety and health practices and to determine the applicability of regulatory limits pr
4、ior to use. Change Notice: Modified 7.4.7 Note #1 Incorporated torque specification requirements previously defined in TDS SD-3.4, updated reference to MPAPS G-4520; Added PDPET-19 to list of referenced documents. 1.0 APPLICATION Clamping load is the primary objective in assembling fasteners (bolts,
5、 nuts, washers), and torque specifications are the most practical way to indicate same. This document contains torque values and specifications for different applications. Torque requirements for joint designs not included in this specification shall be determined by Fastener Engineering, and includ
6、ed on the joint installation drawing. 2.0 SCOPE This specification covers torque requirements necessary to achieve corresponding clamp loads or durability requirements for a variety of standard threaded fastener joints and other well-defined joint designs where extensive testing has determined torqu
7、e ranges that result in the joint meeting its durability requirements. For joint designs such as those when joint strength is the limiting factor, or when special fastener designs, finishes or materials used, predetermining torque ranges to meet clamp loads and/or joint durability requirements is no
8、t practical or possible within a general specification. As such, Faster Engineering shall be consulted in those instances. 2.1 Restricted Chemical Substances Effective January 1, 2007, all product supplied to the requirements of this specification must comply with the requirements of the MPAPS B-50
9、specification. 3.0 CONTENTS PAGE REFERENCE DOCUMENTS 2 FASTENER ASSEMBLY JOINT CLASSIFICATIONS 2 PROCESS CONTROL 2 FASTENER ASSEMBLY SPECIFICATION JOINT CLASS “1” 3 FASTENER ASSEMBLY SPECIFICATION JOINT CLASS “A” 4 FASTENER ASSEMBLY SPECIFICATION JOINT CLASS “B” 6 FASTENER TORQUE BRAKE ASSEMBLY MOUN
10、TING 8 TORQUE CHART FOR ASSEMBLY OF SUSPENSION U-BOLTS 9 NUMBER: MPAPS F-0 TITLE: Fastener Torque Requirements REVISION: 1604 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume a
11、ll patent liability. 2016 by Navistar, Inc. APRIL 2016 Page 2 of 15 3.0 CONTENTS (continued) INSTALLATION TORQUES FOR CLAMPS OF DIFFERENT APPLICATIONS PAGE 10 MULTISTAGE TORQUE PROCEDURE FOR CLAMP INSTALLATION MULTISTAGE TORQUE PROCEDURE: STEERING I-SHAFT PINCH YOKE BOLTS STEERING DRAGLINK CONNECTIO
12、NS TO PITMAN ARM AND AXLE STEERING ARM: TORQUE CHART PROCEDURE FOR RH SHEPPARD PITMAN ARM CONNECTION TO STEERING GEAR DESIGNATION ON DRAWINGS TECHNICAL INFORMATION 11 12 13 13 14 14 4.0 REFERENCE DOCUMENTS Unless otherwise specified, the latest issue of all referenced standards shall apply. The foll
13、owing standards, specifications and regulations are referenced in this specification. Quality System Standard ISO 9001 or TS-16949 NAVISTAR MPAPS-4520 NAVISTAR Engineering Design Std. A-16 ASME/ANSI Y14.5M-1994* CFR Title 29, Part 1910 NAVISTAR MPAPS F-1053 NAVISTAR MPAPS B-50 NAVISTAR MPAPS G-4518
14、NAVISTAR PDPET -19 *Conformance to the 1994 version required 5.0 FASTENER ASSEMBLY JOINT CLASSIFICATIONS Selection of the classification rating is dependent upon the function of the joint, clamp load control requirements, consequences of the joints failure and analysis of reliability/warranty data.
15、These ratings describe the application, assembly methods and quality control procedures. Joints must have a classification rating to determine torque and assembly requirements. Joint classification ratings and associated application characteristics are shown in the table below: Joint Classification
16、Definition 1 Critical joints as defined by the SMT hardware owners requiring precisely specified process controls. A specific subset of Class 1 joints are referred to as “Delta Critical” joints and have a D/PFMEA severity ratings of 9 or 10. A Joint functional requirements dictate a narrow clamp loa
17、d range. B Load transferring joints that can tolerate a modest clamp load variation. C Joints where a broad range of clamp load is permissible. D Defined Special Requirements apply- see Section 7.4 of this document. 6.0 PROCESS CONTROL The following requirements and recommendations apply to all join
18、ts and joint classifications unless otherwise noted. Class specific requirements in addition to those listed in this paragraph are included in their respective paragraphs. 6.1 General Fastener Requirements 6.1.1 The method of controlling torque application during the assembly process shall be determ
19、ined by Advanced Manufacturing Engineering (AME) in agreement with the System Management Team (SMT) and Fastener Engineering as recommended in the PFMEA and documented in the assembly plant Control Plan. NUMBER: MPAPS F-0 TITLE: Fastener Torque Requirements REVISION: 1604 This document is restricted
20、 and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2016 by Navistar, Inc. APRIL 2016 Page 3 of 15 6.1.2 Periodic calibration of power and hand tools is required per assembly plant qua
21、lity control plans. 6.1.3 Use of inline torque transducers for monitoring or auditing dynamic assembly torque is recommended. 6.1.4 For Joint Classes A and B, torque controlled air or electrical nut-runners providing a torque tolerance of typically 5% and 10%, respectively, are recommended. 6.1.5 If
22、 impact wrenches or pulse tools are used, the process shall be to torque to 50% - 70% of maximum torque with tool, followed by hand torque to specified value. 6.2 Prevailing Torque Fastener Requirements 6.2.1 If using prevailing torque fasteners, assume that the prevailing torque element is fully en
23、gaged. 6.2.2 For nuts where the prevailing torque feature is on the top of the nut (Nylon inserts, all metal prevailing torque flange nuts, etc.), this means that two fully formed threads must be visible beyond the top surface of the nut. 7.0 REQUIREMENTS 7.1 FASTENER ASSEMBLY SPECIFICATION: JOINT C
24、LASS 1 7.1.1Application Critical joints as defined by the SMT hardware owners requiring special process controls. Joints with a D/PFMEA severity rating of 9 or 10 are referred to as “Delta” critical and are a specific subset of Class 1 joints. Joints containing Class 1 fastener control are documente
25、d in PDPET-19, Critical Joint Definition. 7.1.2 Class 1 Identification Class 1 Joints will also be identified in a drawing note along with one of the letter suffices defined below or, if no letter suffix is present, then the special requirements subject to the assembly and process controls indicated
26、 in 7.1.3 must be defined and indicated for the specific joint in additional notes on the drawing. 7.1.3 Class 1 Process Requirements Joint Class 1 fasteners MUST have special assembly and process controls that include, but is not limited to, the following: 1. Statistical Process Control demonstrate
27、 capability and control on an ongoing basis 2. Data recording, storage, query for a given operation, and traceable by VIN. 7.1.4 Delta Critical Joints 7.1.4.1The DFMEA severity is included in PDPET-19. Those with a 9 or 10 are considered “Delta Critical”. 7.1.4.2 Delta Critical Joints shall be ident
28、ified on drawings with the symbol Additionally, Delta torque specifications ranges must appear directly on the print and supersede any standard torque tables. NUMBER: MPAPS F-0 TITLE: Fastener Torque Requirements REVISION: 1604 This document is restricted and may not be sent outside Navistar, Inc. o
29、r reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2016 by Navistar, Inc. APRIL 2016 Page 4 of 15 7.2. FASTENER ASSEMBLY SPECIFICATION JOINT CLASS “A” 7.2.1 Application Joint functional requirements dictate a narrow clamp load r
30、ange, and where closer assembly control is desired. Notes: 1. The tables assume the full strength of the fastener can be utilized. If the joint strength is the limiting factor, or special fastener designs, finishes or materials used, refer to the installation diagram for torque values. 2. The tables
31、 apply to: a) Non-Flanged design (regular or locking) with coarse or fine threads and through hardened washers under the rotated number. b) Flanged design (regular or locking) with coarse or fine threads. 7.2.2 Metric Series Fastener Assembly specification JOINT CLASS “A” Table 1: Joint Class “A“ -
32、Class 8.8 Metric Class 8.8 Nominal Diameter Clamp Load Phosphate and Oil HEX Non-Flanged Torque Phosphate and Oil HEX Flanged Torque MPAPS G-4518 or MPAPS G-4520 Finish HEX Flanged Torque* mm k N N-m N-m N-m M6 9.3 9.7 10.7 13.3 14.7 9.7 10.7 M8 17.0 21.7 24.0 26 29 21.7 24.0 M10 27.0 41 46 48 54 41
33、 46 M12 39.1 67 75 91 101 67 75 M14 53.4 101 112 131 146 101 112 M16 72.8 150 166 221 245 150 166 M20 117.6 351 390 X X M22 X X M24 X X X - Contact Fastener Engineering for values as these configurations are not generally used. * - Column Torque also applicable to screw/washer assemblies with phosph
34、ate and oil, MPAPS G-4518 or MPAPS G-4520. NUMBER: MPAPS F-0 TITLE: Fastener Torque Requirements REVISION: 1604 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liab
35、ility. 2016 by Navistar, Inc. APRIL 2016 Page 5 of 15 Table 2: Joint Class “A“ - Class 10.9 Metric Class 10.9 Nominal Diameter Clamp Load Phosphate and Oil HEX Non-Flanged Torque Phosphate and Oil HEX Flanged Torque MPAPS G-4518 or MPAPS G-4520 Finish HEX Flanged Torque mm k N N-m N-m N-m M6 13.4 12
36、.3 13.6 15.8 17.6 11.5 12.8 M8 24.3 29 32 31.3 34.8 25.9 28.8 M10 38.5 52 58 61 68 52 58 M12 56.0 97 108 122 135 97 108 M14 76.4 144 160 188 209 144 160 M16 104.0 215 237 294 325 215 237 M20 162.4 421 468 560 625 421 468 M22 201.6 596 662 X X M24 234.4 758 842 X X X - Contact Fastener Engineering fo
37、r values as these configurations are not generally used. 7.2.3 English Series Fastener Assembly specification JOINT CLASS “A” Table 3: Joint Class “A“ - NAVISTAR Type 5 English NAVISTAR Type 5 Nominal Diameter Clamp Load Phosphate and Oil HEX Non-Flanged Torque* INCH LBS LBS-FT 2160 100 110* 5/16 35
38、60 170 190* 3/8 5280 23 27 7/16 7240 37 42 9640 55 60 9/16 12360 80 90 5/8 15360 115 125 22720 195 215 7/8 31440 315 350 1 41200 475 525 X - Contact Fastener Engineering for values as these configurations are not generally used. * - Column Torque also applicable to screw/washer assemblies with phosp
39、hate and oil, MPAPS G-4518 or MPAPS G-4520. * - Inch Pounds NUMBER: MPAPS F-0 TITLE: Fastener Torque Requirements REVISION: 1604 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assum
40、e all patent liability. 2016 by Navistar, Inc. APRIL 2016 Page 6 of 15 Table 4: Joint Class “A“ - NAVISTAR Type 8 English NAVISTAR Type 8 Nominal Diameter Clamp Load Phosphate and Oil HEX Non-Flanged Torque Phosphate and Oil HEX Flanged Torque MPAPS G-4518 or MPAPS G-4520 Finish HEX Flanged Torque I
41、NCH LBS LBS-FT LBS-FT LBS-FT 1/4 3040 125 140* X X 5/16 5040 240 265* X X 3/8 7440 34 38 X X 7/16 10200 55 60 X X 1/2 13640 75 85 110 120 88 96 9/16 17480 115 125 145 160 115 125 5/8 21680 160 175 220 240 176 192 3/4 32800 275 300 330 370 275 300 7/8 44360 450 500 X X 1 48160 675 750 X X X - Contact
42、 Fastener Engineering for values as these configurations are not generally used. * - Inch Pounds 7.3 FASTENER ASSEMBLY SPECIFICATION JOINT CLASS “B” 7.3.1 Applications: Load transferring joints that can tolerate a modest clamp load variation and where close assembly control is desired. 7.3.2 Metric
43、Series Fastener Assembly specification JOINT CLASS “B” Table 5: Joint Class “B“ - Class 8.8 Metric Class 8.8 Nominal Diameter Clamp Load Phosphate and Oil HEX Non-Flanged Torque Phosphate and Oil HEX Flanged Torque MPAPS G-4518 or MPAPS G-4520 Finish HEX Flanged Torque* mm k N N-m N-m N-m M6 8.7 8.7
44、 10.7 12.0 14.7 8.7 10.7 M8 15.9 19.2 24.0 23 29 19.6 24 M10 25.3 37 46 43 54 37 46 M12 36.7 61 75 82 101 61 75 M14 50.0 92.2 112.0 120 146 92 112 M16 68.3 136 166 200 245 136 166 M20 110.3 312 390 X X M22 X X X M24 X X X X - Contact Fastener Engineering for values as these configurations are not ge
45、nerally used. * - Column Torque also applicable to screw/washer assemblies with phosphate and oil, MPAPS G-4518 or MPAPS G-4520. NUMBER: MPAPS F-0 TITLE: Fastener Torque Requirements REVISION: 1604 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permissio
46、n from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2016 by Navistar, Inc. APRIL 2016 Page 7 of 15 Table 6: Joint Class “B“ - Class 10.9 Metric Class 10.9 Nominal Diameter Clamp Load Phosphate and Oil HEX Non-Flanged Torque Phosphate and Oil HEX Flanged Torqu
47、e MPAPS G-4518 or MPAPS G-4520 Finish HEX Flanged Torque mm k N N-m N-m N-m M6 12.5 11.0 13.6 14.1 17.6 10.2 12.8 M8 22.8 26 - 32 27.8 34.8 23.0 28.8 M10 36.1 47 58 56 68 47 58 M12 52.5 88 108 108 135 88 108 M14 71.6 130 160 171 209 130 160 M16 97.5 193 237 265 325 193 237 M20 152.3 393 468 500 625
48、387 473 M22 189.0 542 662 X X M24 219.7 688 842 X X X - Contact Fastener Engineering for values as these configurations are not generally used. 7.3.3 English Series Fastener Assembly specification JOINT CLASS “B” Table 7: Joint Class “B“ - NAVISTAR Type 5 English NAVISTAR Type 5 Nominal Diameter Clamp Load Phosphate and Oil HEX Non-Flanged Torque* INCH LBS LBS-FT 2000 90 110* 5/16 3350 155 190* 3/8 4950 21 27 7/16 6800 34
