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. 2015 by Navistar, Inc. JUNE 2015 Page 1 of 3 NAVISTAR, INC. Material, Parts, and Process Specifications (
2、MPAPS) NUMBER: MPAPS S-BM-5.101-GS/PL Former Designation: ESP-BM-5.101-GS TITLE: General Purpose Studs Metric Series (Noun Code 8720) CURRENT REV No.: 1506 DATE: June 2015 WRITTEN/EDITED BY: Materials Engineering APPROVED BY: Materials Engineering SUPERSEDES: ESP-BM-5.101-GS - August 2006 PRINTED CO
3、PIES OF THIS DOCUMENT MUST BE VERIFIED FOR CURRENT REVISION This specification 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
4、 practices and to determine the applicability of regulatory limits prior to use. Change Notice: Changed to New MPAPS format. 1.0 GENERAL: This specification contains the essentials of the following standards: International Organization for Standardization: ISO R225, R898/I, and R965/II British Stand
5、ards Institute: BS 4439 The general purpose studs in this standard encompass two types: Equal Threads - Both Ends, and Continuous Threads. These studs are not intended for use where interference fit and sealing are required. General information for metric hex head bolts shown in MPAPS S-BM-1.101-GS/
6、PL will also apply for these general purpose studs. 2.0 POLICY FOR SELECTING PARTS FOR NEW DESIGN: Approved parts are so designated to reduce variety of parts and assure maximum availability, interchangeability, and cost savings. For new design, parts shall be selected from “Approved“ part list only
7、. Material: Steel, Class 8.8 Finish: Plain (PLN) and Phosphate Coated (PHC) Lengths (millimeters) Nominal Sizes M5 M6 M8 M10 M12 M16 M20 M24 20 X 25 X X 30 X X X 35 X X X 40 X X X X 45 X X X X 50 X X X X 55 X X X 60 X X X X 65 X X X 70 X X X 75 X X X X 80 X X X X 90 X X X 100 X X X X 110 X X X 120 X
8、 X X X 130 X X X 140 X X X 150 X X X 160 X X X 170 X X 180 X X 190 X X 200 X X Lengths above the heavy line thru the 10 mm size are preferred for the continuous thread stud Nominal sizes andLength Incrementation: NUMBER: MPAPS S-BM-5.101-GS/PL TITLE: General Purpose Studs REVISION: 1506 This documen
9、t 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. 2015 by Navistar, Inc. JUNE 2015 Page 2 of 3 3.0 STRAIGHTNESS: Studs will be straight within 0.075 within 25 mm of le
10、ngth. 4.0 ENDS OF STUDS: The ends of studs will be finished with a straight chamfer with a 90 included angle to a depth slightly exceeding the depth of thread. 5.0 BODY DIAMETER: The nominal diameter of the unthreaded shank will be equal to the maximum major diameter of the threaded ends and subject
11、 to the following tolerances: Nominal Diameter Tolerance Up to 6 mm, incl Over 6 to 10 mm, incl Over 10 to 18 mm, incl Over 18 to 24 mm, incl +0 -0.12 +0 -0.15 +0 -0.18 +0 -0.21 6.0 THREADS: Thread form, diameters, and associated pitches are in accordance with ISO Recommendations for coarse pitch se
12、ries. Threads will be made to the tolerances of the medium class of fit (6g) for plain and unplated studs as shown in ISO 965/11, General Purpose Metric Screw Threads. The thread length of 1.5 times the diameter for equal threads - both ends were selected because of popular usage in the inch series.
13、 7.0 METHOD OF DESIGNATION: Studs will be designated on purchase orders by size, length, word description, material, finish, and part number as shown in the following examples: M5 x 20, Continuous Thread Stud, Class 8.8, Plain, Part Number M16 x 100, Equal Thread - Both End Stud, Class 8.8, Plain, P
14、art Number 8.0 MATERIAL: Steel, Class 8.8 per MPAPS F-31, Part I. 9.0 FINISH: In accordance with the Corporate Engineering Material Specification and class listed below: Plain (PLN) Zinc Trivalent, Class 6A (ZN6A) MPAPS G-20, Class 6A. Phosphate Coated (PHC) MPAPS G-1, Class B2. 10.0 RESTRICTED CHEM
15、ICAL SUBSTANCES: Effective January 1, 2007, all product supplied to the requirements of this specification must comply with the requirements of the MPAPS B-50 specification. 11.0 WORKMANSHIP: Studs must be free of burrs or any other defects which might affect their serviceability. NUMBER: MPAPS S-BM
16、-5.101-GS/PL TITLE: General Purpose Studs REVISION: 1506 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. 2015 by Navistar, Inc. JUNE 2015 Page 3 of 3 12.
17、0 DIMENSIONS: 13.0 PART LIST: 13.1 Approved: Nominal Size L Length Finish Material Thread Part No. M-8 50 PLN 8.8 TBE 31228R1 M-10 40 PLN 8.8 CT 31149R1 M-12 60 PLN 8.8 CT 40043R1 14.0 TECHNICAL INFORMATION: For further information related to the technical content of this specification, contact: Sup
18、pliers may purchase controlled copies of this specification by contacting: Materials Engineering and Technology Dept. 10400 W. North Avenue Melrose Park, IL 60160 E-mail: MaterialsEngineeringN IHS Global Inc. 15 Inverness Way East Englewood CO 80112-5776 Phone: 1-800-854-7179 E-mail: AutomotiveIHS.c
19、om Website: http:/ Dimensions in millimeters: Nominal Size M5 M6 M8 M10 M12 M16 M20 M24 A Body Diameter, Max 5 6 8 10 12 16 20 24 Body Diameter, Min 4.88 5.88 7.85 9.85 11.82 15.82 19.79 23.79 B Thread Length, Min 7.5 9 12 15 18 24 30 36 Thread Length, Max 9.1 11 14.5 18 21.5 28 35 42 C Unthreaded S
20、hank, Min 2.5 3 4 5 6 8 10 12 D Thread Runout, Max 2 2.5 3.1 3.8 4.4 5 6.2 7.5 COARSE THREAD - 6g Pitch, Nominal 0.8 1 1.25 1.5 1.75 2 2.5 3 Major Diameter, Max Major Diameter, Min 4.976 4.826 5.974 5.794 7.972 7.76 9.968 9.732 11.966 11.701 15.962 15.682 19.958 19.623 23.952 23.577 Pitch Diameter,
21、Max Pitch Diameter, Min 4.456 5.324 7.16 8.994 10.829 14.663 18.334 22.003 4.361 5.212 7.042 8.862 10.679 14.503 18.164 21.803 Minor Diameter, Max Minor Diameter, Min 3.995 4.747 6.438 8.128 9.819 13.508 16.891 20.271 3.842 4.563 6.23 7.888 9.543 13.204 16.541 19.855 Thread Both Ends Continuous Thread (TBE) (CT)
