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Installation Torque Tables for Noncritical ApplicationsThe objective of this project is to define torque values for bolts and screws when loading is not a concern. Fasteners require a certain torque to fulfill its function and prevent failure. NASA Glenn Research Center did not have a set of fastener torque tables for non-critical applications without loads, usually referring to hand-tight or wrench-tight torqueing. The project is based on two formulas, torque and pullout load. Torque values are calculated giving way to preliminary data tables. Testing is done to various bolts and metal plates, torqueing them until the point of failure. Around 640 torque tables were developed for UNC, UNF, and M fasteners. Different lengths of thread engagement were analyzed for the 5 most common materials used at GRC. The tables were put together in an Excel spreadsheet and then formatted into a Word document. The plan is to later convert this to an official technical publication or memorandum.
Document ID
20170003491
Acquisition Source
Glenn Research Center
Document Type
Technical Memorandum (TM)
Authors
Rivera-Rosario, Hazel T. (Puerto Rico Univ. Mayaguez, Puerto Rico)
Powell, Joseph S. (NASA Glenn Research Center Cleveland, OH United States)
Date Acquired
April 17, 2017
Publication Date
April 1, 2017
Subject Category
Structural Mechanics
Report/Patent Number
GRC-E-DAA-TN37585
NASA/TM-2017-219475
E-19347
Funding Number(s)
WBS: WBS 432938.11.01.03.06.02.20
Distribution Limits
Public
Copyright
Public Use Permitted.
Keywords
installation
assembly
torque

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