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GM C141

3rd Edition, May 2011

Complete Document

Metric Oval 90 Degree Countersunk Trim Head Type 1A Cross Recess Machine Screws

Includes all amendments and changes through Inactive for New Design Notice 4, May 2011


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Additional Comments:
ENGLISH * INACTIVE FOR NEW DESIGN
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Referenced Items:

ASME B1.13M
GM C200
GM C201
GM C230

Product Details:

  • Revision: 3rd Edition, May 2011
  • Published Date: May 2011
  • Status: Not Active, See comments below
  • Document Language: English
  • Published By: General Motors Company (GMNA)
  • Page Count: 3
  • ANSI Approved: No
  • DoD Adopted: No

Description / Abstract:

This standard for Metric Oval 90┬░ Countersunk Trim Head Type 1A Cross Recess Machine Screws conforms in all essentials, except head proportions, with the American National Standard covering metric machine screws. Basically, the smaller head proportions of the trim heads were derived by applying to the respective screw diameters the 1976 standard oval head diameters applicable to the next smaller screw size, and specifying a rounded edge. It should be noted that, for the most part, the Type 1A cross recess configuration will serve to identify these screws as being metric.