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 13 NAVISTAR, INC. Material, Parts, and Process Specifications
2、(MPAPS) NUMBER: MPAPS S-BM-3.101-GS/PL Former Designation: ESP-BM-3.101-GS TITLE: Hex Flange Head Bolts Metric Series CURRENT REV No.: 1506 DATE: June 2015 WRITTEN/EDITED BY: Materials Engineering APPROVED BY: Materials Engineering SUPERSEDES: ESP-BM-3.101-GS - December 2012 PRINTED COPIES OF THIS D
3、OCUMENT 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 practices and
4、 to determine the applicability of regulatory limits prior to use. Change Notice: Changed to New MPAPS format; Combined GS, GI, PP, NPP. 1.0 GENERAL: Implementation of this standard must be in accordance with the policies and procedures outlined in MPAPS S-A-0.101. There may also be supplemental gro
5、up 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 recognition of these possible differences, the sizes and tolerance ranges used were established in an effor
6、t to enable the use of commercially available items, dimensionally interchangeable worldwide. This specification is based on and contains elements of the following standards: International Organization for Standardization: ISO 68, 261, 262, 888, 898/1, 965/1 and 965/2 American National Standard: ANS
7、I B-18.2.3.9M - 2001 (Heavy Hex dimensions) 2.0 CONTENTS: Page General 1 Design Consideration 2 Metric-Inch Related Sizes 2 Threads 3 Thread Tolerances 3 Basic Thread Length Formula 3 Property Class 3 Hardness Comparison 3 Color Coding 3 Method of Designation 3 Policy for Selecting Parts for New Des
8、ign 4 Head 4 Gaging of Heavy Hex Flange Head 4 Position of Head 5 Flange 5 NUMBER: MPAPS S-BM-3.101-GS/PL TITLE: Heavy Hex Flange Head Bolts REVISION: 1506 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Supp
9、liers are required to assume all patent liability. 2015 by Navistar, Inc. JUNE 2015 Page 2 of 14 3.0 DESIGN CONSIDERATION: Hex flange head bolts are intended for use in applications which normally necessitate the usage of a flat washer under the bolt head; such as, to bridge slotted or oversize clea
10、rance holes, or to minimize embedment when mated against material of relatively low compressive strength. 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 th
11、e thread roots. Less likely to be seriously affected by decarburization and oversize minor diameter of internal threads. 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 co
12、nsidered as a recommendation for substitutions but only as a means of exhibiting approximate dimensional and stress area relationship. Nominal Metric Sizes Inch Size (By Stress Area) Diameter mm Pitch mm Stress Area mm 2 Nearest Smallest Size Nearest Larger Size Diameter in Pitch TPI Stress Area Dia
13、meter in Pitch TPI Stress Area mm 2 % Metric mm 2 % Metric M6 1.00 20.1 #12 24 15.6 78 1/4 20 20.5 102 M8 1.25 36.6 5/16 18 33.8 92 3/8 16 50.0 137 M10 1.50 58 3/8 16 50.0 86 7/16 14 68.6 118 M12 1.75 84.3 7/16 14 68.6 81 1/2 13 91.5 108 M 14 * 2.00 115.0 1/2 13 91.5 80 9/16 12 117.4 102 M16 2.00 15
14、7 5/8 11 145.8 93 3/4 10 215.5 137 Page Bearing Surface 5 Fillet 5 Body Diameter 6 Points 8 Length 9 Straightness 10 Thread Length 10 Thread Series and Tolerance Class 12 Thread Gaging 12 Identification Symbols 12 Material 12 Surface Discontinuities 12 Finishes 12 Restricted Chemical Substances Part
15、 List 12 13 Technical Information 14 NUMBER: MPAPS S-BM-3.101-GS/PL TITLE: Heavy Hex Flange Head Bolts 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 paten
16、t liability. 2015 by Navistar, Inc. JUNE 2015 Page 3 of 14 5.0 THREADS: The ISO basic profile is essentially the same geometric configuration as the unified screw thread basic form. The threads will be coarse series, tolerance class 6g. 6.0 THREAD TOLERANCES: The ISO medium class of fit 6H(int)/6g(E
17、xt) is approximately the same as the 2A(Ext)/2B(Int) allowance in the U.S. unified thread series for comparable size. For Example: 7.0 BASIC THREAD LENGTH FORMULA: The basic thread lengths shown in Table 10 are Millimeters Nominal Length Formula for Thread Length Over To - 125 2d + 6 125 200 2d + 12
18、 200 - 2d - 25 D = Nominal Diameter of the Bolt 8.0 PROPERTY CLASS: The property class designation symbol for steel bolts consists of two parts, the first is approximately one-hundredth of the minimum tensile strength in megapascals (1 MPa = 1 N/mm2) and the second is one-tenth of the ratio between
19、the minimum yield stress and the minimum tensile strength, expressed as a percentage. The multiplication of the figures will approximate 1/10 the minimum yield stress in megapascals (MPa). 9.0 HARDNESS COMPARISON: Core Hardness Class 10.9 Navistar Type 8 Min (Rockwell) C31 C33 Max (Rockwell) C39 C39
20、 Range (Min to Max) 8 6 10.0 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 is standard identifier used in some industries. This must be handled internally at individual plants where ne
21、eded and is meant to be supplemental to the normal finish and easily deleted when the need for supplemental identification no longer exists. The supplemental blue color should not be used on finishes such as chromium bright which are specified for cosmetic purposes or phosphate coating which may cau
22、se a loss of color identity. 11.0 METHOD OF DESIGNATION: Hex flange head bolts will be designated by size, length, word description, material, finish, and part number as shown in the following example: M10 x 50, Hex Flange Head Bolt, Class 10.9, PHC, Part Number The absence of a specification for pi
23、tch indicates that coarse thread is required; e.g., a coarse thread of the dimensions M10 x 1.5 is designated as “M10.“ Thread Allowance M10 x 1.5 - 6H(Int)/6g(Ext) 0.032 mm (.00126 in) 3/8-16 UNC 2A(Ext)/2B(Int) .0013 in (0.033 mm) NUMBER: MPAPS S-BM-3.101-GS/PL TITLE: Heavy Hex Flange Head Bolts R
24、EVISION: 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 4 of 14 12.0 POLICY FOR SELECTING PARTS FOR NEW DESIG
25、N: 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. Material: Steel, Class 10.9 Finish: Phosphate Coating (PHC) Length Incrementation: Dimensions
26、in millimeters: Length in mm M5 M6 M8 M10 M12 M16 M20 Length in mm M5 M6 M8 M10 M12 M16 M20 10 X X 60 X X X X X X X 12 X X X 70 X X X X X X X 14 X X X 80 X X X X X X 16 X X X X 90 X X X X X X 20 X X X X X 100 X X X X X 25 X X X X X 110 X X X X X 30 X X X X X X 120 X X X X 35 X X X X X X 130 X X 40 X
27、 X X X X X X 140 X X 45 X X X X X X X 150 X X 50 X X X X X X X 160 X X 13.0 HEADS: The top of head will be either full form or indented at manufacturers option, and will be chamfered or rounded. The diameter of the chamfer circle or start of rounding shall be equal to the maximum width across flats,
28、 S maximum, within a tolerance of minus 15 percent. If the top of the head is indented, the periphery may be rounded. The head height, K, is the distance, parallel to the axis of the screw, from the plane of the bearing circle to the top of the head, not including any raised markings. The wrenching
29、height, KW, is the distance at a corner of the hexagon, from the junction of hex head with the flange to the last plane of full-formed hexagon (i.e., the plane closest to the top of head at which the width across corners, E, of the hexagon is within its specified limits). The corner fill rounding du
30、e to lack of fill at the six corners of the head will be reasonably uniform. 14.0 GAGING OF HEAVY HEX FLANGE HEAD: See Table 1. The head will be gaged using two ring gages, A and B, to demonstrate the coincidental acceptability of wrenching height, corner fill and width across corners. Gage A will b
31、e placed over the head and will seat on the flange. Gage B will be placed on the top of head normal to the screw axis. The two gages shall not be in contact. NUMBER: MPAPS S-BM-3.101-GS/PL TITLE: Heavy Hex Flange Head Bolts REVISION: 1506 This document is restricted and may not be sent outside Navis
32、tar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2015 by Navistar, Inc. JUNE 2015 Page 5 of 14 TABLE 1 GAGING OF HEAVY HEX FLANGE HEADS Dimensions in millimeters: Nominal Screw Diameter and Thread Pitch Gage A Gage
33、B Wa Inside Diameter Ta Thickness Wb Inside Diameter Tb Thickness Max Min1 Max2 Min Max3 Min Min M5 x 0.8 9.25 9.24 2.40 2.39 8.55 8.54 3.0 M6 x 1 11.56 11.55 2.70 2.69 10.79 10.78 3.0 M8 x 1.25 15.02 15.01 3.60 3.59 14.07 14.06 4.0 M10 x 1.5 17.33 17.32 4.60 4.59 16.31 16.30 4.0 M12 x 1.75 20.79 20
34、.78 5.20 5.19 19.67 19.66 5.0 M14 x 2 24.26 24.25 6.30 6.29 22.57 22.56 5.0 M16 x 2 27.72 27.71 7.10 7.09 25.93 25.92 6.0 M20 x 2.5 34.65 34.64 8.80 8.79 32.65 32.64 6.0 15.0 POSITION OF HEAD: At maximum material condition, the axis of the hexagon of the head shall be within a positional tolerance z
35、one of the diameter specified in Table 2 with respect to the axis of the shank over a distance under the head equal to the nominal screw diameter, D. The datum shall be a close to the head as practicable, but within 0.5D from the head, and shall be either wholly plain body or wholly the thread pitch
36、 diameter, not including the thread runout or the underhead fillet. Dimensions in millimeters: TABLE 2 TOLERANCE ZONES Nominal Screw Diameter and Thread Pitch M5 0.8 M6 1 M8 1.25 M10 1.5 M12 1.75 M14 2 M16 2 M20 2.5 Position of Head-to-Shank Tolerance Zone Diameter at MMC 0.44 0.44 0.54 0.54 0.54 0.
37、66 0.66 0.66 Circular Runout of Bearing Circle to Shank FIM 4 0.17 0.21 0.27 0.34 0.42 0.48 0.56 0.70 16.0 FLANGE: The top surface of the flange will be conical or slightly rounded (convex). Radius, R2, applies both at the corners and at the flats of the hexagon. The contour of edge at flange periph
38、ery, between the maximum flange diameter, DC maximum, and the minimum bearing circle diameter, DW minimum, shall be optional provided that the minimum flange edge thickness, C minimum, is maintained at the minimum bearing circle diameter, DW minimum. 17.0 BEARING SURFACE: The bearing surface shall b
39、e conical, 0.75 0.50 deg concave from the plane formed by the bearing circle diameter. The plane formed by the bearing circle shall be perpendicular to the axis of the shank, over a length under the head equal to the nominal screw diameter, D, within the circular runout as specified in Table 2. The
40、measurement of bearing face runout shall be made at the actual bearing circle (i.e., at the line of highest points on any radial line, e.g., by use of straight edge anvil). The datum shall be as close to the head as practical, and shall be either wholly plain body or wholly thread pitch diameter, no
41、t including the thread runout or the underhead fillet. 18.0 FILLET: The fillet configuration at the junction of the head and shank shall conform to either Type F, as shown in Table 3, which also specifies limits, or Type U, as shown in Table 4, which 1 Wa min. equals theoretical maximum width across
42、 corners, E max. 2Ta max. equals minimum wrenching height, KW min. 3 Wb max. equals minimum width across corners, E min., -0.01 mm. 4Circular runout of bearing circle to shank is based on 1 deg and the minimum bearing circle diameter, DW min. NUMBER: MPAPS S-BM-3.101-GS/PL TITLE: Heavy Hex Flange He
43、ad Bolts 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 6 of 14 also specifies limits, at the optio
44、n of the manufacturer unless the fillet type is specified by the purchaser. The fillet shall be a smooth and continuous curve fairing smoothly into the underhead bearing surface and the shank within the limits specified. For Type F, no radius in the fillet contour shall be less than R1 minimum speci
45、fied in Table 3. TABLE 3 DIMENSIONS OF TYPE F5 UNDERHEAD FILLETS Body Diameter, DS6 Fillet Length, Lf Fillet Radius, R1 Nominal Screw Diameter and Thread Pitch For Short7 and Long Screws Max. For Short Screws Min. For Short Screws Min. For Long Screws Max. For Short Screws Max. For Short and Long Sc
46、rews Min. M5 x 0.8 5.7 5.1 4.36 1.4 0.7 0.2 M6 x 1 6.8 6.2 5.21 1.6 0.9 0.25 M8 x 1.25 9.2 8.3 7.04 2.1 1.1 0.4 M10 x 1.5 11.2 10.2 8.86 2.1 1.2 0.4 M12 x 1.75 13.7 12.2 10.68 2.1 1.3 0.6 M14 x 2 15.7 14.1 12.50 2.1 1.4 0.6 M16 x 2 17.7 16.5 14.50 3.2 1.6 0.6 M20 x 2.5 22.4 20.7 18.16 4.2 2.1 0.8 19
47、.0 BODY DIAMETER: The diameter of the body, DS, on screws that are not threaded full length shall be within the limits specified in Table 5, unless the purchaser specifies screws with reduced diameter body. For screws threaded full length, the diameter of the unthreaded shank under the head shall ne
48、ither exceed the maximum body diameter, DS maximum, specified in Table 5 nor be less than the minimum body diameter, DS minimum, specified in Table 3 or 4. Screws of nominal lengths equal to or greater than the shortest nominal lengths specified in Table 6 may be obtained with reduced diameter body, if so specified. Where reduced diameter body (or “Type R”) is specified, the body diameter, D2, shall be within the limits specified in Table 6. The screw shall have a shoulder under the head. Th
