| CPC B23P 19/06 (2013.01) [B23P 23/02 (2013.01); B23P 2700/01 (2013.01); B64F 5/10 (2017.01)] | 20 Claims | 

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               1. A method comprising: 
            moving a torque wrench of an end effector toward a first surface of a structure while the torque wrench contains a collar; 
                contacting the first surface of the structure with a contact pad of the torque wrench; 
                pulling a vacuum through an opening of the contact pad while the contact pad is in contact with the first surface of the structure; and 
                installing the collar onto a fastener extending through the first surface of the structure while the vacuum is pulled through the opening of the contact pad. 
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