Tried explaining to my 4 year old the purpose of the lockwasher and she asked how it worked? I came to the realization I didn’t know. Help my educate my child by educating me please!
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An interesting point is stacking two washers is recommended in some installation conditions.
If the user is using torque (versus bolt stretch) for installation, two washers helps the actual torque be closer to the target. Bolt torque can be impacted by conditions between the head of the bolt and the surface
Source: Performance Characterization of Bolt Torquing Techniques: Sealing Technology and Plant Leakage Reduction Series. EPRI (Electric Power Research Institute), March 26, 2002.
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