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GM C144

3rd Edition, May 1, 2011

Complete Document

Metric Oval 90 Degree Countersunk Trim Head 6-Lobed Socket 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 C210
GM C230
GM4405M

Product Details:

  • Revision: 3rd Edition, May 1, 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 6-Lobed Socket Machine Screws conforms in all essentials, except head proportions and driving provisions, with the American National Standard covering metric machine screws. Basically, the smaller 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.