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Prevailing Torque Locking Feature in Threaded Fasteners Using Anaerobic AdhesiveThis paper presents results from tests to assess the use of anaerobic adhesive for providing a prevailing torque locking feature in threaded fasteners. Test procedures are developed and tests are performed on three fastener materials, four anaerobic adhesives, and both unseated assembly conditions. Five to ten samples are tested for each combination. Tests for initial use, reuse without additional adhesive, and reuse with additional adhesive are performed for all samples. A 48-hour cure time was used for all initial use and reuse tests. Test data are presented as removal torque versus removal angle with the specification required prevailing torque range added for performance assessment. Percent specification pass rates for the all combinations of fastener material, adhesive, and assembly condition are tabulated and reveal use of anaerobic adhesive as a prevailing torque locking feature is viable. Although not every possible fastener material and anaerobic adhesive combination provides prevailing torque values within specification, any combination can be assessed using the test procedures presented. Reuse without additional anaerobic adhesive generally provides some prevailing torque, and in some cases within specification. Reuse with additional adhesive often provides comparable removal torque data as in initial use.
Document ID
Acquisition Source
Ames Research Center
Document Type
Conference Paper
Hernandez, Alan
(University of South Florida Tampa, FL, United States)
Hess, Daniel P.
(University of South Florida Tampa, FL, United States)
Date Acquired
June 30, 2016
Publication Date
May 4, 2016
Publication Information
Publication: 43rd Aerospace Mechanisms Symposium
Subject Category
Structural Mechanics
Mechanical Engineering
Distribution Limits
Public Use Permitted.
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