1、* For General Specifications, see ESP-DM-1.101-GS. 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. 2008 by Navistar, Inc. OCTOBER 2008 Page 1 of 2 NAVIST
2、AR, INC. Engineering Standard Parts NUMBER ESP-DM-20.101-PP TITLE: Hexagon Washer Head Tapping Screws Preferred Parts Metric Series (Noun Code 7450) CURRENT ISSUE DATE: October 2008 WRITTEN/REVIEWED BY: Corporate Technical Standards APPROVED BY: Corporate Technical Standards SUPERSEDES ISSUE OF: Aug
3、ust 2006 PRINTED COPIES OF THIS DOCUMENT MUST BE VERIFIED FOR CURRENT REVISION Change Notice: Revised point diameter requirements per latest standards. Added taper length variations for long and short screws per latest standards. Added minimum practical nominal screw length recommendation per latest
4、 standards. Replaced International Truck and Engine Corporation with Navistar, Inc. per corporate directive. Machine Screw Threads (Types D, F, and T) Nominal Screw Size M3 M4 M5 M6 M8 M10 Dimensions in millimeters: Thread Pitch 0.5 0.7 0.8 1.0 1.25 1.5 A Head Width Max 5 7 8 10 13 15 Min 4.82 6.78
5、7.78 9.78 12.73 14.73 B Width Across Corners Min 5.36 7.55 8.66 10.89 14.17 16.41 C Head Height Max 1.52 2.80 3.05 4.83 5.84 7.49 Min 1.24 2.44 2.67 4.37 5.28 6.86 D Washer Diameter Max 6.2 9.2 10.5 13.2 17.2 19.8 Min 5.8 8.5 9.8 12.2 15.9 18.3 F Washer Thickness Max 0.5 0.7 0.8 1.3 1.4 1.6 Min 0.3
6、0.5 0.5 0.8 0.9 0.9 R1 Head Fillet Radius Max 0.5 0.7 0.8 1.0 1.2 1.5 R Fillet Radius Max 0.5 0.6 0.8 1.0 1.2 1.5 Min 0.2 0.2 0.3 0.3 0.4 0.5 G Point Diameter Max 2.32 3.07 3.94 4.69 6.40 8.08 Min 2.26 2.97 3.84 4.55 6.24 7.88 H Point Taper Length (Short Screws)1 Max 1.8 2.5 2.8 3.5 4.4 5.3 Min 1.3
7、1.8 2.0 2.5 3.1 3.8 Point Taper Length (Long Screws)2 Max 2.3 3.2 3.6 4.5 5.6 6.8 Min 1.8 2.5 2.8 3.5 4.4 5.3 K* Protrusion Beyond Gaging Ring Min 0.74 1.46 1.6 2.62 3.17 4.12 L Minimum Practical Nominal Screw Length Pan, Hex and Hex Flange Heads 5 6 7 9 11 13 Flat and Oval Countersunk Heads 6 9 10
8、12 16 18 1 Tabulated maximum and minimum limits are equal to 3.5 and 2.5 times the thread pitch, respectively, rounded to the nearest 0.1mm. 2 Tabulated maximum and minimum limits are equal to 4.5 and 3.5 times the thread pitch, respectively, rounded to the nearest 0.1mm and shall be applicable to s
9、crews of nominal lengths equal to or longer than those listed in row L. Copyright Navistar International Corporation Provided by IHS under license with INTERNNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NUMBER: ESP-DM-20.101-PP TITLE: Hexagon Washer Head Tapping
10、 Screws Preferred Parts CURRENT ISSUE DATE: October 2008 For General Specifications, see ESP-DM-1.101-GS. 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.
11、 2008 by Navistar, Inc. OCTOBER 2008 Page 2 of 2 Nominal Size Pitch Length Thread Type Finish Material Part Number M8 1.25 16 D ZN6A CST 30924R1 M8 1.25 20 D ZN6A CST 30923R1 M10 1.5 20 D ZN6A CST 31213R1 Nominal Size Pitch Length Thread Type Finish Material Part Number M4 0.7 10 T PLN CST 30839R1 M6 1.0 12 D ZN6A CST 30956R1 M6 1.0 12 D PHC CST 40062R1 M8 1.25 13 T PLN CST 30491R1 PREFERRED PARTS NON PREFERRED PARTS Copyright Navistar International Corporation Provided by IHS under license with INTERNNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
