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 14 1.0 GENERAL: Implementation of this standard must be in acc
2、ordance with the policies and procedures outlined In MPAPS S-A-0.101. There may also be supplemental group instructions in regard to use of metric standards that should be taken into account. Some segments of the ISO and national standards encompassed by this general specification may differ. In rec
3、ognition of these possible differences, the sizes and tolerance ranges used were established in an effort to enable the use of commercially available items, dimensionally interchangeable worldwide. This specification contains the essentials of the following standards: International Organization for
4、Standardization: ISO/4014 American National Standards Institute: ANSI B18.2.3.1M German Institute of Standards: DIN 931 For M10, M12 and M14 sizes, across flats, across corners and head height dimensions on page 11, reflect the latest ISO/TC2 decisions. Many bolts presently being manufactured and us
5、ed, will be to the old ISO dimensions (1 mm larger across flats). It is recommended that locations, such as European operations sourcing to old ISO dimensions, continue to do so until a complete and cost effective transition to the new dimensions is accomplished. Locations sourcing to the new ANSI/I
6、SO dimensions (as stated in this standard), are urged to monitor stock and procurement practices to assure consistent production availability of the latest bolts. For M22 size, dimensions across flats and corners are shown per latest ISO/TC2 decisions. The previous width across flats and corners, wh
7、ich are shaded in gray, will be deleted from the standard on its next issue. Letter symbols designating dimensional characteristics are in accord with those used in ANSI and ISO standards. NAVISTAR, INC. Material, Parts, and Process Specifications (MPAPS) NUMBER: MPAPS S-BM-1.101-GS/PL Former Design
8、ation: ESP-BM-1.101-GS TITLE: Hex Head Bolts Metric Series CURRENT REV No.: 1604 DATE: April 2016 WRITTEN/EDITED BY: J. Goldschmidt APPROVED BY: R. Goluch SUPERSEDES: ESP-BM-1.101-GS - June 2015 PRINTED COPIES OF THIS DOCUMENT MUST BE VERIFIED FOR CURRENT REVISION This specification may involve haza
9、rdous 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 prior to use. Change Notice:
10、 Changed referenced page numbers in sections 1.0, 7.0, 22.0 and 24.0 to reference section numbers. NUMBER: MPAPS S-BM-1.101-GS/PL TITLE: Hex Head Bolts REVISION: 1604 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Stan
11、dards. Suppliers are required to assume all patent liability. 2016 by Navistar, Inc. APRIL 2016 Page 2 of 14 2.0 CONTENTS: 3.0 DESIGN CONSIDERATION: The use of thru hardened washers (MPAPS S-FM-16.101-GS/PL) is recommended in high strength bolted connections and in any Class 8.8 application involvin
12、g oversize or slotted holes. Coarse thread series only will be considered as part of this standard, because of the following advantages: Less tendency to cross thread. Resists nicking and has less stress concentration at the thread roots. Less likely to be seriously affected by decarburization and o
13、versize minor diameter of internal threads. Page General 1 Design Consideration 3 Metric-Inch Related Sizes 3 Threads 3 Thread Tolerances 3 Thread Length Formula 3 Property Class 3 Color Coding 3 Method of Designation 4 Policy for Selecting Parts for New Design 4 Head 4 Corner Fill 5 True Position o
14、f Head 5 Bearing Surface 5 Fillet 5 Body Diameter 6 Points 6 Length Tolerance 7 Threads 7 Requirements For Drilled Holes In Body 7 Thread Length 8 Thread Runout 10 Straightness 10 Bolt Identification 10 Material 11 Finishes 11 Restricted Chemical Substances Surface Discontinuities 11 11 Dimensions 1
15、2 Part List 13 Technical Information 14 NUMBER: MPAPS S-BM-1.101-GS/PL TITLE: Hex Head Bolts 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 liabilit
16、y. 2016 by Navistar, Inc. APRIL 2016 Page 3 of 14 4.0 METRIC-INCH RELATED SIZES: During the inch to metric design transition period, the following chart of related sizes can be used for reference. This information is not to be considered as a recommendation for substitutions but only as a means of d
17、etermining approximate dimensional equivalents. Metric Series mm Approximate Inch Series 6 1/4 8 5/16 10 3/8, 7/16 12 1/2 14 9/16 16 5/8 18 20 3/4 22 7/8 24 1 27 1 30 1-1/8, 1-1/4 36 1-1/2 5.0 THREADS: The ISO basic profile is essentially the same geometric configuration as the unified screw thread
18、basic form. The threads will be coarse series, tolerance class 6g. 6.0 THREAD TOLERANCES: The ISO medium class of fit 6H (int)/6g (Ext) is approximately the same as the 2A(Ext)/2B(Int) allowance in the U.S. unified thread series for comparable size. For Example: Thread Allowance M10 x 1.5 - 6H(Int)/
19、6g(Ext) 0.032 mm (.00126 in) 3/8-16 UNC 2A(Ext)/2B(Int) .0013 in (0.033 mm) 7.0 THREAD LENGTH FORMULA: The thread lengths shown in section 22.0 are based on the formulas shown Millimeters Nominal Length Formula for Thread Length Over To - 125 200 125 200 - 2d + 6 2d + 12 2d + 25 d = Nominal Diameter
20、 of the Bolt 8.0 PROPERTY CLASS: The property class designation symbol for steel bolts of two parts, the first is approximately one-hundredth of the minimum tensile strength in megapascals (MPa)1, and the second is one-tenth of the ratio between the minimum yield stress and the minimum tensile stren
21、gth, expressed as a percentage. The multiplication of the figures will approximate 1/10 the minimum yield stress in megapascals (MPa). 9.0 COLOR CODING: Not recommended except in cases where adequate insurance is needed to prevent mixing of “metric parts“ with look-alike “inch parts.“ The color blue
22、 is standard identifier used in some industries. This must be handled internally at individual plants where needed and is 1 MPa = 1 N/mm2 NUMBER: MPAPS S-BM-1.101-GS/PL TITLE: Hex Head Bolts REVISION: 1604 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without p
23、ermission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2016 by Navistar, Inc. APRIL 2016 Page 4 of 14 meant to be supplemental to the normal finish and easily deleted when the need for supplemental identification no longer exists. The supplemental blue c
24、olor should not be used on finishes such as chromium bright which are specified for cosmetic purposes or phosphate coating which causes a loss of color identity. 10.0 METHOD OF DESIGNATION: Hex head bolts are designated by the following data, preferably in the sequence shown: product name, nominal d
25、iameter, nominal length, steel property class or material identification, special feature, if any, and part number as shown in the following examples: Hex Head Bolt, M10 x 50, Class 10, PHC, Part Number Hex Head Bolt, M6 x 25, Class 8.8, Drilled, ZN8F, Part Number NOTE: It is common practice in ISO
26、Standards to omit thread pitch from the product size designation when screw threads are the metric coarse thread series, e.g., M10 is M10 x 1.5. 11.0 POLICY FOR SELECTING PARTS FOR NEW DESIGN: Approved parts are so designated to reduce variety of parts and assure maximum availability, interchangeabi
27、lity and cost savings. For new design, parts shall be selected from “Approved“ part list only. Material: Class 10.9 (all sizes) Finishes: Phosphate Coating (PHC) Nominal Size and Length Incrementation: Lengths mm Nominal Diameters Dimensions in millimeters: M6 M8 M10 M12 M16 M20 M24 M30 M36 12 x x 1
28、6 x x 20 x x x 25 x x x x 30 x x x x x 35 x x x x x x 40 x x x x x x 45 x x x x x x 50 x x x x x x x 60 x x x x x x x x 70 x x x x x x x x x 80 x x x x x x x x x 90 x x x x x x x x x 100 x x x x x x x x 110 x x x x x x x x 120 x x x x x x x 130 x x x x x x x 140 x x x x x x x 150 x x x x x x x 160 x
29、 x x x x x 180 x x x x x x 2 mm Increments Under 12 mm 20 mm Increments Over 180 mm NUMBER: MPAPS S-BM-1.101-GS/PL TITLE: Hex Head Bolts REVISION: 1604 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Supplier
30、s are required to assume all patent liability. 2016 by Navistar, Inc. APRIL 2016 Page 5 of 14 12.0 HEAD: The top of the head will be full form and chamfered or rounded. The diameter of the chamfer circle or the start of rounding will be equal to the maximum width across flats within a tolerance of m
31、inus 15 percent. 13.0 CORNER FILL: The rounding due to lack of fill at the six corners of the head will be reasonably uniform. 14.0 TRUE POSITION OF HEAD: The axis of the hex head will be located at true position with respect to the axis of the bolt (determined over a distance under the head equal t
32、o one bolt diameter) within a tolerance zone of diameter specified below. Dimensions in millimeters. Nominal Sizes M6 M8 M10 M12 M14 M16 M20 M24 M30 M36 Total Run out 0.44 0.56 0.70 0.84 0.98 1.12 1.40 1.68 2.10 2.52 15.0 BEARING SURFACE: The bearing surface will be flat and washer faced. Diameter o
33、f bearing surface will not exceed the width across flats nor be less than the specified minimum washer face diameter. For referee purposes, measurement of bearing surface diameter will be taken at mid thickness of the washer face. The plane of the bearing surface will be perpendicular to the axis of
34、 the body within the total run out specified below. The measurement of bearing face run out will be made as close to the periphery of the washer face as possible while the bolt is held in a collet or other gripping device at a distance equal to one bolt diameter from the underside of the head. Dimen
35、sions in millimeters. Nominal Size M6 M8 M10 M12 M14 M16 M18 M20 M22 M24 M27 M30 M36 Total Run out 0.25 0.28 0.32 0.35 0.39 0.43 0.48 0.53 0.58 0.63 0.71 0.78 0.93 16.0 FILLET: The fillet configuration at the junction of the head and shank will be as shown below, and will have limits is specified be
36、low. The fillet will be a smooth and continuous curve fairing smoothly into the underhead bearing surface and the shank within the limits specified. No radius in the fillet contour will be less than R minimum. NUMBER: MPAPS S-BM-1.101-GS/PL TITLE: Hex Head Bolts REVISION: 1604 This document is restr
37、icted 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 6 of 14 Dimensions in millimeters: Nominal Bolt Diameter and Thread Pitch Da Fillet Tran
38、sition Diameter R Fillet Radius Max Min M6 x 1 6.8 0.25 M8 x 1.25 9.2 0.4 M10 x 1.5 11.2 0.4 M12 x 1.75 13.7 0.6 M14 x 2 15.7 0.6 M16 x 2 17.7 0.6 M18 x 2.5 20.2 0.6 M20 x 2.5 22.4 0.8 M22 x 2.5 24.4 0.8 M24 x 3 26.4 0.8 M27 x 3 30.4 1.0 M30 x 3.5 33.4 1.0 M36 x 4 39.4 1.0 17.0 BODY DIAMETER: The di
39、ameter of the body on bolts which are not threaded full length will be within the limits specified in dimensional Table. For bolts threaded full length, the diameter of the unthreaded shank under the head will not exceed the specified maximum body diameter nor be less than the minimum body diameter
40、(DS1) specified below. Minimum Body Diameter for Product Threaded to Head Dimensions in millimeters: Nominal Sizes M6 M8 M10 M12 M14 M16 M20 M24 M30 M36 DS1 5.21 7.04 8.86 10.68 12.50 14.50 18.16 21.80 27.46 33.12 18.0 POINTS: At manufacturers option, the end of the bolt will be chamfered from a dia
41、meter equal to or slightly less than the thread root diameter to produce a length of chamfered or incomplete thread within the limits for “Z“ shown in Table below or will have a rounded point of radius “V“ given in Table below. The end of the point will be reasonably square with the axis of bolt and
42、, where pointed blanks are used, the slight rim or cup resulting from roll threading will be permissible. Dimensions in millimeters: Nominal Bolt Size V Z Point Radius Point Length Approx. Max Min M6 8.4 2.00 0.50 M8 11.2 2.50 0.62 M10 14.0 3.00 0.75 M12 16.8 3.50 0.88 M14 19.6 4.00 1.00 M16 22.4 4.
43、00 1.00 M18 25.2 5.00 1.25 Nominal Bolt Size V Z Point Radius Point Length Approx. Max Min M20 28.0 5.00 1.25 M22 30.8 5.00 1.25 M24 33.6 6.00 1.50 M27 37.8 6.00 1.50 M30 42.0 7.00 1.75 M36 50.4 8.00 2.00 V equals 1.4 times nominal screw diameter. Z max equals 2 times thread pitch Z min equals 0.5 t
44、imes thread pitch NUMBER: MPAPS S-BM-1.101-GS/PL TITLE: Hex Head Bolts 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 liability. 2016 by Navistar, I
45、nc. APRIL 2016 Page 7 of 14 19.0 LENGTH TOLERANCE: The length of the bolt will be measured parallel to the axis of the bolt from the underhead bearing surface to the extreme end of the shank. Dimensions in millimeters: Nominal Lengths Nominal Sizes M6 thru M8 M10 thru M16 M18 thru M24 M27 thru M36 t
46、o 10mm 0.3 0.3 Over 10 to 18 mm 0.4 0.4 Over 18 to 30 mm 0.4 0.4 0.7 Over 30 to 50 mm 0.5 0.8 1.3 1.5 Over 50 to 80 mm 0.6 1.0 1.5 1.8 Over 80 to 120 mm 0.7 1.1 1.8 2.0 Over 120 to 180 mm 1.3 1.3 2.0 2.3 Over 180 to 240 mm 2.3 2.3 2.3 3.0 Over 240 mm 3.0 3.0 3.0 3.0 20.0 THREADS: Thread form, diamet
47、ers, and associated pitches are in accordance with ISO Recommendations for coarse pitch series. Threads will be made to the tolerances of the medium class of fit (6g-external threads) for plain or unplated bolts as shown in ISO 965/II, General Purpose Metric Screw Threads. The threads after plating
48、must not exceed the basic size which is the maximum material condition (minimum size) of the internal thread. 21.0 REQUIREMENTS FOR DRILLED HOLES IN BODY: (Non-Preferred) Dimensions in Millimeters: D J* H M6 3 1.6 M8 3.3 2 M10 4.2 2.5 M12 5 3.2 M16 6 4 M18 6 4 M20 6.5 4 M22 6.5 4 M24 8.5 5 * Drilled
49、 holes are to be located from under the head a distance equal to nominal L minus J. NUMBER: MPAPS S-BM-1.101-GS/PL TITLE: Hex Head Bolts 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 liability. 2016 by Navistar, Inc. APRIL 2016 Page 8 of 14 22.0 THREAD LENGTH: The length of thread on bolts will be controlled
