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-C-90.101-GS/PL Former Designation: ESP-C-90.101-GS TITLE: Penetration Gages and Gaging for Cross Recess Machine Screws - English Series (Noun Code 7450) CURRENT REV No.: 1506 DATE: June 2015 WRITTEN/EDITED BY: Materials Engineering APPROVED BY: Materials Engineering SUPERSEDES
3、 ESP-C-90.101-GS - March 2002 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
4、 to consult appropriate safety and health practices and to determine the applicability of regulatory limits prior to use. Change Notice: Changed to New MPAPS format. 1.0 GENERAL: Penetration gaging is a test to determine suitability of recesses in the heads of screws and may be used to indicate defi
5、ciencies in the dimensions of the recesses specified in the dimensional tables. Penetrations which are too deep indicate the possibility of a thin section between the head and shank of screw, a weakness which might result in twisting-off screw heads during tightening of the screws. Use of screws hav
6、ing shallow penetrations might result in production problems such as reaming of recesses or excessive wear on driver bits. Penetration gaging depth values for the various styles of cross recess heads are included in the dimensional tables for the respective heads. These values were predicated origin
7、ally on the gaging of plain finish (uncoated or unplated) screws. However, subsequent experience has shown these values to be suitable for the gaging of screws having coating thickness up to and including .0003 inch on significant surfaces. Screws having heavier coatings, which fail to meet the pene
8、tration gaging requirements, will be stripped of finish and gaged for acceptance or rejection in plain condition. Penetration is gaged relative to a reference plane defined by the intersection of the edge of the recess wings with the top surface of the screw head. This plane is the same as the top s
9、urface of a flat head screw but is somewhat below the topmost portion of heads, which have rounded top surfaces. Knife-edges or tapered ridges on the gage head are used to establish the reference plane. A reverse reading dial gage is used to indicate the penetration of the gage point into the recess
10、 The gage may be zeroed on any flat surface. Specified above are dimensions of gage points to be used for penetration gaging. Gage points approach as nearly as possible perfect driver form. Also specified are gage heads and bushings, which adapt gage points to standard dial gages. Illustrations and
11、 inch dimensional data are shown on the following pages. NUMBER: MPAPS S-C-90.101-GS/PL TITLE: Penetration Gages and Gaging for Cross Recess Machine Screws REVISION: 1506 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical
12、Standards. Suppliers are required to assume all patent liability. 2015 by Navistar, Inc. JUNE 2015 Page 2 of 3 2.0 DIMENSIONS: INCH DIMENSTIONS OF GAGE POINTS ENLARGED “PHLILIPS” POINT DETAIL A B C D E F G H J K L M Size of Recess Gage Point Dia Point Width Length Length Dia Wing Thickness Point Wid
13、th Milling Angle Flat on End Base Flute Angle Side Flute Angle Flute Width at otto +0.0002 +0.0000 -0.0010 0.005 0.005 0.005 Max Min +0.0010 -0.0000 +00 -15 Max Min +15 -00 +15 -00 +0.0000 -0.0010 No. 0 0.0450 0.0240 0.656 0.781 0.094 0.012 0.010 0.0320 7 00 0.015 0.010 * 9200 0.0151 * 1 0.0870 0.03
14、94 0.688 0.812 0.156 0.020 0.018 0.0500 7 00 0.020 0.015 13800 9200 0.0202 2 0.1410 0.0606 0.750 0.875 0.219 0.025 0.013 0.0900 5 45 0.020 0.015 14000 9200 0.0434 3 0.2090 0.0983 0.781 0.906 0.250 0.031 0.029 0.1500 5 45 0.020 0.015 14600 9200 0.0826 4 0.3120 0.1407 0.844 0.969 0.359 0.044 0.042 0.2
15、000 7 00 0.020 0.015 15300 9200 0.1078 5 0.5000 0.2310 1.031 1.156 0.531 0.063 0.061 0.3110 7 00 0.025 0.020 16246 9200 0.1730 NOTES: * 1. Tolerances on size No. O is plus 0.0000 and minus 0.0026 in. *2. Base of flute on size No. 0 is 0.0090 to 0.0109 in. radius NUMBER: MPAPS S-C-90.101-GS/PL TITLE:
16、 Penetration Gages and Gaging for Cross Recess Machine Screws 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
17、2015 Page 3 of 3 INCH DIMENSIONS OF GAGE POINTS A B C D E F G H J K L* M* N N* P R Size of Recess Gage Point Dia Point Width At Base of R Radius Length Length Dia Wing Thick- ness Point Width Milling Angle Milling Offset Angle Milling Offset Angle Rib Form Angle Wing Form Angle Wing Offset Angle Win
18、g Offset Angle Flat on End Radius +0.0010 +0.001 +00 +06 +06 +07 +07 +0.005 0.0002 Max Min 0.005 0.005 0.005 -0.0000 -0.000 -06 -00 -00 -00 -00 -0.000 Max Min No. 0 0.0450 0.0280 0.0264 0.656 0.781 0.094 0.0165 0.035 7 00 4 23 7 45 46 00 46 00 22 2 00 0.010 0.004 0.003 1 0.0870 0.0438 0.4023 0.688 0
19、812 0.156 0.0265 0.054 7 00 4 23 7 45 46 00 46 00 22 2 00 0.015 0.005 0.004 2 0.1410 0.0670 0.0655 0.750 0.875 0.219 0.0380 0.095 5 45 3 00 5 20 46 00 46 00 17 2 04 0.015 0.008 0.006 3 0.2090 0.1020 0.1005 0.781 0.906 0.250 0.0530 0.155 5 45 3 00 6 20 56 15 46 00 17 2 04 0.015 0.012 0.008 4 0.3120
20、0.150 0.1505 0.844 0.969 0.359 0.0810 0.203 7 00 4 23 7 45 56 15 46 00 22 2 00 0.015 0.020 0.014 5 0.5000 0.2420 0.2400 1.031 1.156 0.531 0.0910 0.315 7 00 4 23 7 45 56 15 46 00 22 2 00 0.020 0.040 0.035 These dimensions are measured normal to the milling cut. 3.0 RESTRICTED CHEMICAL SUBSTANCES: Eff
21、ective January 1, 2007, all product supplied to the requirements of this specification must comply with the requirements of the MPAPS B-50 specification. 4.0 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:/
