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 6 NAVISTAR, INC. Material, Parts, and Process Specifications (
2、MPAPS) NUMBER: MPAPS S-EM-40.101-GS/PL Former Designation: ESP-EM-40.101-GS TITLE: Hex Piloted Projection Weld Nuts Metric Series (Noun Code 5780) CURRENT REV No.: 1506 DATE: June 2015 WRITTEN/EDITED BY: Materials Engineering APPROVED BY: Materials Engineering SUPERSEDES: ESP-EM-40.101-GS - March 20
3、11 PRINTED COPIES 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 safe
4、ty and health practices and to determine the applicability of regulatory limits prior to use. Change Notice: Changed to New MPAPS format; Combined GS, GI, PP; Changed 30700R1 Nut Thickness from 5.6-5.1mm to 7.0-7.5mm. 1.0 GENERAL: Implementation of this standard must be in accordance with the polici
5、es 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. Weld nuts are used as prepositioned nuts that permit blind one-sided assembly of parts. These nuts are designed with 3 or 6 project
6、ions at the corners for projection welding. A pilot around the threaded hole is used to positively locate the nut when it is inserted into the hole provided in the part to which it is assembled. The pilot also minimizes the splatter of molten metal into threads during the welding operation. There is
7、 no National or International Standard on this product. The specifications are based upon local manufacture and user requirements. Inch series weld nuts may be found in MPAPS S-E-40.101-GS/PL. 2.0 RESTRICTED CHEMICAL SUBSTANCES: Effective January 1, 2007, all product supplied to the requirements of
8、this specification must comply with the requirements of the MPAPS B-50 specification. 3.0 CONTENTS: Page General 1 Restricted Chemical Substances 1 Design Consideration 2 Metric-Inch Related Sizes 2 Threads 2 Thread Tolerances 2 Color Coding 2 Method of Designation 2 Policy for Selecting Parts for N
9、ew Design 3 Miscellaneous Dimension 3 Threads 3 Marking 3 Material 3 NUMBER: MPAPS S-EM-40.101-GS/PL TITLE: Hex Piloted Projection Weld Nuts REVISION: 1506 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Supp
10、liers are required to assume all patent liability. 2015 by Navistar, Inc. JUNE 2015 Page 2 of 6 4.0 DESIGN CONSIDERATION: Weld nuts are used for blind fastening of parts. They permit the use of a threaded fastener on metals too thin to be tapped, and they position readily into a drilled or punched p
11、ilot hole. 5.0 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 determining approximate dimensional equi
12、valents. Metric Series Approximate mm Inch Series 6 1/4 8 5/16 10 3/8, 7/16 12 1/2 14 9/16 16 5/8 6.0 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 6H. 7.0 THREAD TOLERANCES: T
13、he medium ISO class of fit 6H/6g is approximately the same as the 2A/2B allowance in the U.S. unified thread series for comparable size. For example: Thread Allowance M10 x 1.5 - 6H/6g 0.032 mm (.00126 in) 3/8-16 UNC 2A/2B .0013 in (0.033mm) 8.0 COLOR CODING: Not recommended, except in cases where a
14、dequate 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 needed and is meant to be supplemental to the normal finish and easily deleted when
15、the need for supplemental identification no longer exists. The supplemental blue color should not be used on material such as stainless steel which is specified for cosmetic purposes, or phosphate coating which may cause a loss of color identity. 9.0 METHOD OF DESIGNATION: Weld nuts will be designat
16、ed by size, word description, type, series, and part number as follows: M10, Hex Short Piloted Weld Nut, 6 Projection, Regular, Part Number M10, Hex Long Piloted Weld Nut, 6 Projection, Heavy, Part Number The absence of a specification for pitch indicates that coarse thread is required; e.g., a coar
17、se thread of the dimensions M10 x 1.5 is designated as “M10.“ Page Finish 3 Surface Discontinuities 3 Dimension and Part List 3 Technical Information 6 NUMBER: MPAPS S-EM-40.101-GS/PL TITLE: Hex Piloted Projection Weld Nuts REVISION: 1506 This document is restricted and may not be sent outside Navis
18、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 3 of 6 10.0 POLICY FOR SELECTING PARTS FOR NEW DESIGN: Approved parts are so designated to reduce variety of parts and assure ma
19、ximum availability, interchangeability, and cost savings in volume buying. For new design, parts shall be selected from “Approved“ part list only. Sizes: Regular Series - M5, M6, M8, and M10. Heavy Series - M10, M12, and M16. 11.0 MISCELLANEOUS DIMENSIONS: Tops of nuts may be chamfered or rounded at
20、 corners and edges provided the flat area and degree of flatness are sufficient to provide intimate contact with the welding electrode. The axis of the threaded hole will be at right angles to the top face within 2. Pilot diameter will not be eccentric with threaded hole by more than 0.2 mm. Height
21、of all projections of any one nut will be within 0.13 mm of each other. 12.0 THREADS: Threads will conform to ISO metric internal threads, tolerance Class 6H. 13.0 MARKING: Weld nuts will be identified as metric by the symbol “M“ or a numerical 9 indented on the top surface of the nut. 14.0 MATERIAL
22、: Low Carbon Steel (STL), AISI 1008 or 1010. Nuts will meet proof load requirements for property Class 9 metric nuts per ASTM A563M. 15.0 FINISH: Plain. 16.0 SURFACE DISCONTINUITIES: Allowable limits are defined in MPAPS F-31, Part II. In addition, nuts will be free from burrs, sharp edges, loose sc
23、ale, dirt, or other contaminants which adversely affect their weldability or serviceability. 17.0 DIMENSIONS AND PART LIST: 17.1 6 Projections Regular Series Short Pilot: NUMBER: MPAPS S-EM-40.101-GS/PL TITLE: Hex Piloted Projection Weld Nuts REVISION: 1506 This document is restricted and may not be
24、 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 6 17.1.1 Approved: *Non Preferred 17.1.2 Not for New Design: Dimensions in millimeters: Nominal Size M5
25、Pitch, Nominal 0.8 A Width Across Flats, Max Min 11.00 10.73 B Width Across Corners, Min 12.12 C Nut Thickness, Max Min 4.8 4.4 D Pilot Diameter, Max Min 7.65 7.35 E Chamfer Diameter, Min 5.8 F Pilot Height, Max Min 1.03 0.77 G Projection Height, Max Min 0.47 0.31 H Projection Width, Min 2.64 J Loca
26、ting Height. Ref 0.30 R Projection Radius, Nom 2.87 Recommended Plate Thickness, Max Min 1.5 1.0 Recommended Hole Size in Plate, Max Min 8.0 7.7 Part Number 30946R1 Dimensions in millimeters: Nominal Size M6 M8 M10 M12* Pitch, Nominal 1 1.25 1.5 1.75 A Width Across Flats, Max Min 13.00 12.73 15.00 1
27、4.73 18.00 17.73 21.00 20.67 B Width Across Corners, Min 14.38 16.61 20.03 23.35 C Nut Thickness, Max Min 7.5 7.1 8.2 9.9 7.0 6.6 7.7 9.4 D Pilot Diameter, Max Min 9.1 11.1 13.6 16.1 8.8 10.8 13.3 15.8 E Chamfer Diameter, Min 6.8 8.8 11.0 13.0 F Pilot Height, Max Min 1.13 1.13 1.29 1.39 0.87 0.87 1.
28、03 1.13 G Projection Height, Max Min 0.52 0.52 0.63 0.73 0.36 0.36 0.47 0.57 H Projection Width, Min 3.17 3.69 4.49 5.29 J Locating Height. Ref 0.35 0.35 0.40 0.40 R Projection Radius, Nom 3.54 4.64 5.40 6.25 Recommended Plate Thickness, Max Min 1.6 1.6 1.9 1.9 1.1 1.1 1.3 1.4 Recommended Hole Size
29、in Plate, Max Min 9.5 9.2 11.5 11.2 14.0 13.7 16.5 16.2 Part Number 30700R1 30701R1 30702R1 30703R1 NUMBER: MPAPS S-EM-40.101-GS/PL TITLE: Hex Piloted Projection Weld Nuts REVISION: 1506 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corp
30、orate Technical Standards. Suppliers are required to assume all patent liability. 2015 by Navistar, Inc. JUNE 2015 Page 5 of 6 17.2 6 Projections Heavy Series Long Pilot: 17.2.1 Approved Dimensions in millimeters: Nominal Size M10 M12 M14 * M16 Pitch, Nominal 1.5 1.75 2 2 A Width Across Flats, Max 1
31、8.00 21.00 24.00 26.00 Min 17.73 20.67 23.67 24.90 B Width Across Corners, Min 20.03 23.35 26.75 28.14 C Nut Thickness, Max 12.2 14.3 16.5 19.0 Min 11.7 13.8 15.9 18.4 D Pilot Diameter Max 13.4 16.1 19.0 20.5 Min 13.1 15.8 18.7 20.2 E Chamfer Diameter, Min 10.7 12.8 15.0 17.0 F Pilot Height, Max 1.9
32、3 1.93 1.93 1.93 Min 1.67 1.67 1.67 1.67 G Projection Height, Max 1.08 1.08 1.08 1.08 Min 0.92 0.92 0.92 0.92 H Projection Width, Min 4.49 5.29 6.09 6.61 Locating Height, Ref 0.8 0.8 0.8 0.8 K Counterbore Diameter, Max 12.80 15.25 18.25 19.50 Min 12.55 15.00 18.00 19.25 M Counterbore Depth, Max 1.50
33、 1.50 1.50 1.50 Min 1.25 1.25 1.25 1.25 R Projection Radius, Nom 3.31 4.34 5.53 6.38 Recommended Plate Thickness, Max 6.5 6.5 6.5 6.5 Min 1.9 1.9 1.9 1.9 Recommended Hole Size in Plate, Max 13.8 16.5 19.5 21.0 Min 13.5 16.2 19.2 20.7 Part Number 30704R1 30705R1 30707R1 *Non Preferred NUMBER: MPAPS S
34、-EM-40.101-GS/PL TITLE: Hex Piloted Projection Weld Nuts 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
35、Page 6 of 6 17.2.2 Not for New Design: Dimensions in millimeters: Nominal Size M8 * Pitch, Nominal 1.25 A Width Across Flats, Max 15.00 Min 14.73 B Width Across Corners, Min 16.61 C Nut Thickness, Max 9.3 Min 8.8 D Pilot Diameter Max 11.1 Min 10.8 E Chamfer Diameter, Min 8.6 F Pilot Height, Max 1.93
36、 Min 1.67 G Projection Height, Max 1.08 Min 0.92 H Projection Width, Min 3.69 Locating Height, Ref 0.8 K Counterbore Diameter, Max 10.50 Min 10.25 M Counterbore Depth, Max 1.50 Min 1.25 R Projection Radius, Nom 2.44 Recommended Plate Thickness, Max 6.5 Min 1.9 Recommended Hole Size in Plate, Max 11.
37、5 Min 11.2 Part Number 30696R1 *Non Preferred 18.0 TECHNICAL INFORMATION: For further information related to the technical content of this specification, contact: Suppliers 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.com Website: http:/
