1、INTERNATIONAL TRUCK AND ENGINE CORPORATION Engineering Standard Parts NUMBER: ESP-DM-61.101-GS TITLE: Round Head Metallic Drive Screws General Specifications Metric Series (Noun Code 7450)CURRENT ISSUE DATE: August 2006 WRITTEN/REVIEWED BY: Corporate Technical Standards APPROVED BY: Corporate Techni
2、cal StandardsSUPERSEDES ISSUE OF: March 2002PRINTED COPIES OF THIS DOCUMENT MUST BE VERIFIED FOR CURRENT REVISION Change Notice: Replaced Zinc Dichromate (ZND) finish specification with Zinc Trivalent, Class 6A (ZN6A) finish specification. Added requirement to comply with CEMS B-50, Restricted Chemi
3、cal Substances. GENERAL: This specification contains the essentials of the following standards: American National Standard: B-18.6.4 British Standards Institution: BS 4174 Metallic drive screws in this standard are primarily for use in cast iron, metal shapes and plastics. These screws are hammered
4、or forced into appropriate holes and are intended for making permanent fastenings. PREFERRED PARTS POLICY: Preferred parts are so designated to reduce variety of parts and assure maximum availability, interchangeability, and cost savings. Finishes: Plain (PLN) Zinc Trivalent (ZN6A) Nominal Sizes and
5、 Length Incrementation: Dimensions in millimeters: Nominal SizeLength 0 2 4 6 8 10 12 14 3.2 X 4.8 X X X 6.4 X X X X X 8 X X X X X X9.5 X X X X X 12.7 X X X HEAD HEIGHT: The tabulated head height represents a metal to metal measurement, parallel to axis of screw, from the top of head to the bearing
6、surface. BEARING SURFACE: The bearing surface of the head will be perpendicular to the axis of the screw shank within 2. ECCENTRICITY: The head will not be eccentric with axis of screw by more than 3 percent of the maximum head diameter. Eccentricity is defined as one-half of the full indicator move
7、ment (FIM). This document is restricted and may not be sent outside International Truck and Engine Corporation or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2006 by International Truck and Engine Corporation. AUGUST 2006 P
8、age 1 of 3 Copyright International Truck and Engine Corporation Provided by IHS under license with INTERNNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NUMBER: ESP-DM-61.101-GS TITLE: Round Head Metallic Drive Screws General SpecificationsCURRENT ISSUE DATE: Augus
9、t 2006 This document is restricted and may not be sent outside International Truck and Engine Corporation or reproduced without permission from LENGTH: The length of screw will be measured, parallel to axis of screw, from the bearing surface of head to the extreme end of pilot point. The tolerance o
10、n length will be as tabulated below: Nominal Length Tolerance on Length Up to 9.5 mm (3/8 inch) Incl. Over 9.5 mm (3/8 inch) 0.5 mm (.02 in) 0.8 mm (.03 in) THREADS: Threads will have a lead angle of 45 to 65 . THREAD LENGTH: Screws will have fully formed threads extending from the base of pilot to
11、the head except that the threads at entering end and under head may have incomplete crests for a length not to exceed one-half of the maximum screw diameter, due to the natural flow of material in the thread forming operation. POINT: Screws will have pilot point, the blunt end of which may be slight
12、ly angular due to the natural flow of material in the cut-off process. MATERIAL: Carbon steel screws (CST) suitably hardened to meet the following performance requirement. Screws driven into holes of sizes recommended (see dimensional table) in steel test plates having a hardness of Rockwell B 70 to
13、 85, or in cast iron, will produce mating threads without shearing of the threads on screw or breaking the screw. FINISHES: Screws will be furnished plain, plated or coated in accordance with the International Engineering Material Specification and Class listed below. Zinc Trivalent (ZN6A) on steel
14、CEMS G-20, Class 6A. Chromium Bright (CRB) CEMS G-19, Part III, Class 5 CRB. RESTRICTED CHEMICAL SUBSTANCES: Effective January 1, 2007, all product supplied to the requirements of this specification must comply with the requirements of the CEMS B-50 specification. METHOD OF DESIGNATION: Drive screws
15、 will be designated by nominal size, length, word description, material, finish, and part number as shown in the following example: 8 x 9.5 mm Drive Screw, CST, ZN6A, Part Number WORKMANSHIP: Drive screws must be free from burrs, loose scale, and all other defects that might affect their serviceabil
16、ity. Corporate Technical Standards. Suppliers are required to assume all patent liability. 2006 by International Truck and Engine Corporation. AUGUST 2006 Page 2 of 3 Copyright International Truck and Engine Corporation Provided by IHS under license with INTERNNot for ResaleNo reproduction or networ
17、king permitted without license from IHS-,-,-NUMBER: ESP-DM-61.101-GS TITLE: Round Head Metallic Drive Screws General SpecificationsCURRENT ISSUE DATE: August 2006 This document is restricted and may not be sent outside International Truck and Engine Corporation or reproduced without permission from
18、Dimensions in millimeters: A B C D Recommended Thread Head Head Pilot Hole SizeDiameter Diameter Height Diameter Drill Hole Nominal Size Number of Thread Starts Max Min Max Min Max Min Max Min Size Diameter 0 6 1.9 1.83 3.22 3 1.24 1.04 1.6 1.52 51 1.7 2 8 2.54 2.46 4.11 3.71 1.75 1.5 2.11 2.03 44 2
19、18 4 7 2.95 2.84 5.36 4.9 2.18 1.9 2.44 2.34 37 2.64 6 7 3.56 3.45 6.6 6.1 2.62 2.31 2.95 2.84 31 3.05 7 8 3.91 3.81 7.24 6.7 2.82 2.51 3.2 3.1 29 3.45 8 8 4.24 4.11 7.85 7.29 3.05 2.72 3.45 3.35 27 3.66 10 8 4.62 4.5 9.12 8.48 3.48 3.12 3.81 3.71 20 4.09 12 8 5.38 5.23 10.36 9.7 3.89 3.53 4.5 4.39
20、 11 4.85 14 9 6.15 6 11.61 10.9 4.32 3.94 5.13 5.03 2 5.61 L Length 3.1 4.8 6.35 7.9 9.5 12.7E* Pilot Length For L 1.2 1.2 1.2 1.2 1.6 1.6 Corporate Technical Standards. Suppliers are required to assume all patent liability. 2006 by International Truck and Engine Corporation. AUGUST 2006 Page 3 of 3 Copyright International Truck and Engine Corporation Provided by IHS under license with INTERNNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
