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GM9084P

8th Edition, September 2015

Complete Document

Test For Prevailing Torque Nuts

Includes all amendments and changes through Inactive for New Design Notice 4, September 2015


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ENGLISH * INACTIVE FOR NEW DESIGN
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Product Details:

  • Revision: 8th Edition, September 2015
  • Published Date: September 2015
  • Status: Active, Most Current
  • Document Language: English
  • Published By: General Motors Company (GMNA)
  • Page Count: 3
  • ANSI Approved: No
  • DoD Adopted: No

Description / Abstract:

Note: Nothing in this standard supercedes applicable laws and regulations.

Note: In the event of conflict between the English and domestic language, the English language shall take precedence.

Purpose. This standard provides a method for evaluating certain performance characteristics of prevailing torque type nuts.

Foreword. Not applicable.

Applicability. The test consists of one installation and one removal of the nut in a test machine using a constant speed nutrunner. For the test, the nut is assembled on a phosphate and oil coated bolt of a grade or property class corresponding to the nut, and a zinc plated test washer is used as the bearing surface. During the installation and removal, three quantities are measured and recorded electronically: (1) prevailing torque on, (2) torque at specified tension, and (3) prevailing torque off.