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-EM-74.101-GS/PL Former Designation: ESP-EM-74.101-GS TITLE: Wing NutsMetric Series (Noun Code 5780) CURRENT REV No.: 1506 DATE: June 2015 WRITTEN/EDITED BY: Materials Engineering APPROVED BY: Materials Engineering SUPERSEDES: ESP-EM-74.101-GS - August 2006 PRINTED COPIES OF TH
3、IS 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 practices
4、 and to determine the applicability of regulatory limits prior to use. Change Notice: Changed to New MPAPS format; Combined GS, PP. 1.0 GENERAL: This specification contains the essentials of the following standards: International Organization for Standardization: R68, R262, 898/II, and DR965/II Fren
5、ch Standardization Association: NFE 27-454 German Institute of Standardization: DIN 315 General information for metric nuts in MPAPS S-EM-1.101-GS/PL also applies, essentially, to this standard. Inch series wing nuts may be found in MPAPS S-E-74.101-GS/PL. 2.0 POLICY FOR SELECTING PARTS FOR NEW DESI
6、GN: 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. Nominal Sizes: M6, M8, M10, and M12 Material: Steel, Class 5 Finish: Zinc Trivalent, Class 6A
7、(ZN6A) 3.0 SQUARENESS: The axis of the thread of the nut will be square to the face of the nut within 2 degrees. 4.0 CHAMFER: Wing nuts will be countersunk on the bearing face at an included angle of 90 to 120 degrees slightly to exceed the major diameter of the thread by an amount sufficient to eli
8、minate encroachment of the thread on the bearing surface. 5.0 THREADS: Thread form, diameters and associated pitches are in accordance with ISO recommendations. Threads will be made to the tolerances for the medium class of fit (6H - internal threads) as shown in ISO 965/II, General Purpose Metric S
9、crew Threads. 6.0 MATERIAL: Steel, Class 5, per MPAPS F-31, Part II. Nuts may be produced by cold forging or hot forming. NUMBER: MPAPS S-EM-74.101-GS/PL TITLE: Wing Nuts REVISION: 1506 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corpo
10、rate Technical Standards. Suppliers are required to assume all patent liability. 2015 by Navistar, Inc. JUNE 2015 Page 2 of 3 7.0 MECHANICAL PROPERTIES: The property class designation system for steel nuts will be a number which is one-hundredth of the approximate proof load stress in megapascals (M
11、Pa). The proof load stress corresponds to the minimum tensile strength of the highest class of bolt or screw with which the nut can be used. Property Class Designation for Nuts Property Class Designation: 5 Proof Load Stress, MPa: 500 8.0 FINISHES: In accordance with the Navistar Engineering Materia
12、l Specification and class listed below: Plain (PLN) Free from dirt and rust and coated with a light oil film. Zinc Trivalent (ZN6A) MPAPS G-20, Class 6A. 9.0 RESTRICTED CHEMICAL SUBSTANCES: Effective January 1, 2007, all product supplied to the requirements of this specification must comply with the
13、 requirements of the MPAPS B-50 specification. 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 in
14、dividual plants where needed 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 phosph
15、ate coating which may cause a loss of color identity. 11.0 METHOD OF DESIGNATION: Wing nuts will be designated by size, word description, material class, finish, and part number as follows: Wing Nut, M10, Class 5, ZN6A, Part Number 12.0 WORKMANSHIP: Nuts must be free from burrs, slivers, seams, and
16、other defects which might affect their serviceability. NUMBER: MPAPS S-EM-74.101-GS/PL TITLE: Wing 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 pate
17、nt liability. 2015 by Navistar, Inc. JUNE 2015 Page 3 of 3 13.0 DIMENSIONS AND PART LIST: 13.1 Approved: Dimensions in millimeters: Nominal Size M6 M8 M10 M12 A Between Wings, Min 10 12 16 19 B Wing Thickness, Min 2.5 3 4 5 C Boss Height, Nom 8 10 11 12 D Wing Spread, Min 32 40 48 54 E Wing Height,
18、Min 16 20 25 28 F Boss Diameter, Min 12 15.5 18 21 G Wing Thickness, Nom 3 4 5 6 K Radius 5 6 8 10 R Radius 1 1 1.2 1.2 COARSE THREAD, 6H Pitch, Nom 1 1.25 1.5 1.75 Major Diameter, Max 5.153 6.912 8.676 10.441 Major Diameter, Min 4.197 6.647 8.376 10.106 Pitch Diameter, Max (Ref) 5.5 7.348 9.206 11.
19、063 Pitch Diameter, Min (Ref) 5.35 7.188 9.026 10.863 FINISH PART NUMBERS - MATERIAL CLASS 5 Zinc Trivalent (ZN6A) 30585R1 934900R1 14.0 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:/
