1、 WORLDWIDE ENGINEERING STANDARDS General Specification GMW3281 Hexagon Nuts with Flange Product Grade A Copyright 2011 General Motors Company All Rights Reserved October 2011 Originating Department: North American Engineering Standards Page 1 of 4 1 Introduction 1.1 Scope. This standard gives specif
2、ications for hexagon nuts with thread diameters from M6 to M16. Basis for this standard is ISO 4161 See Figure 1. 1.2 Designation. GMW3281. 2 References Note: Only the latest approved standards are applicable unless otherwise specified. 2.1 External Standards/Specifications. ISO 724 ISO 4161 ISO 898
3、-2 ISO 4759-1 ISO 965-1 ISO 6157-2 ISO 1502 ISO/TS 16949 2.2 GM Standards/Specifications. GMW3059 GMW3317 3 Requirements Figure 1: Hexagon Flange Nut Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW3281 Copyright
4、 2011 General Motors Company All Rights Reserved October 2011 Page 2 of 4 3.1 Dimensions. See Figure 2 and Table 1. Figure 2: Dimension Illustration Table 1: Dimensions Diameter M6 M8 M10 M12 M14 M16 P Pitch 1 1.25 1.5 1.75 2 2 c Minimum 1.1 1.2 1.5 1.8 2.1 2.4 da Maximum 6.75 8.75 10.75 13 15.1 17.
5、3 Minimum 6 8 10 12 14 16 dc Maximum 14.2 17.9 21.8 26 29.9 34.5 dw Minimum 12.2 15.8 19.6 23.8 27.6 31.9 e Minimum 11.05 14.38 16.64 20.03 23.36 26.75 m Maximum 6 8 10 12 14 16 Minimum 5.7 7.64 9.64 11.57 13.3 15.3 mw Note 1 Minimum 3.1 4.6 5.9 6.8 7.7 8.9 r Note 2 Maximum .36 .48 .6 .72 .88 .96 s
6、Maximum 10 13 15 18 21 24 Minimum 9.78 12.73 14.73 17.73 20.67 23.67 Property Class 8 8 10 10 10 10 Note 1: If the product passes the gaging given in ISO4161 Annex A, the requirements for dimensions e, c and m w are satisfied. Note 2: Radius r applies both at the corners and the flats of the hexagon
7、. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW3281 Copyright 2011 General Motors Company All Rights Reserved October 2011 Page 3 of 4 3.2 Material. ISO 898-2. See Table 1 for property class for each nut diame
8、ter. 3.3 Surface Treatment. As specified on the detail drawing. 3.4 Thread. ISO 724, ISO 965-1. Thread tolerance, recommended 6G before surface treatment. After surface treatment, the thread shall be gaged according to ISO 1502 with a GO-gage of tolerance H. 3.5 Tolerances. Product Grade A, ISO 4759
9、-1. 3.6 Surface Discontinuities. ISO 6157-2. 3.7 Mechanical Properties. ISO 898-2. 3.8 Acceptability. ISO/TS 16949, GM Production Part Approval Process (PPAP). 4 Rules and Regulations 4.1 Legal Regulations. All materials must satisfy applicable laws, rules, regulations and recommendations valid in t
10、he country of usage. 4.2 Language. In the event of conflict between the English and domestic language, the English language shall take precedence. 4.3 Inspection and Rejection. Samples of components or materials released to a GM general specification shall be tested for conformity with the requireme
11、nts of this general specification and approved by the responsible Engineering department prior to commencement of delivery of bulk supplies. A new approval must be received for any changes, e.g., properties, manufacturing process, location of manufacture, etc. If not otherwise agreed, all testing an
12、d documentation normally required for initial release must be completed. It is the responsibility of the supplier to inform the customer in a timely manner, without solicitation, and to include documentation of all modifications of materials and/or processes and to apply for a new release. If not ot
13、herwise agreed, all release tests shall be repeated and documented by the supplier prior to commencement of delivery of non-conforming bulk supplies. In individual cases, a shorter test can be agreed to between the responsible Engineering department and the supplier. 4.4 Initial Source Approval. Not
14、 applicable 4.5 All materials supplied to this standard must comply with the requirements of GMW3059, Restricted and Reportable Substances for Parts. 5 Notes 5.1 Glossary. Not applicable. 5.2 Acronyms, Abbreviations, and Symbols. PPAP Production Part Approval Process 6 Coding System This standard sh
15、all be referenced in other documents, drawings, etc., as follows: GMW3281 7 Release and Revisions This standard was originated in May 1999. It was first approved by Fasteners Engineering in February 2000. It was first published in June 2000. Issue Publication Date Description (Organization) 1 JUN 20
16、00 Initial publication. 2 JUN 2001 Editorial revision. (GMNA) 3 MAY 2005 Reformatted 3.3. (Fasteners Group Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW3281 Copyright 2011 General Motors Company All Rights Res
17、erved October 2011 Page 4 of 4 Issue Publication Date Description (Organization) 4 OCT 2011 Five year refresh. Removed part numbers and finish from the spec, revised M10 WAF from 16 mm to 15 mm. (Fasteners Global Council) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
