Installation tool system for Hi-Lok-type fasteners

A tool for installing a threaded fastener of the Hi-Lok type, comprising a pin component having a headed end and a threaded end with a hex recess therein, and a collar component having a threaded body and a torque-off nut, which comprises:

• body means comprising rotary motivating means;
• drive head assembly means generally fixedly supported on said body means and having rotary power receiving means therein operatively connected to said motivating means for rotation of said receiving means;
• tubular socket means having forward and rearward portions and having a cylindrical through bore, said rearward portion being rotatably supported by said drive head means and operatively connected to said power receiving means for rotation of said socket means during a fastener installation event, and said forward portion having a forwardly opening hex drive socket recess therein that is operatively engageable with said torque-off nut;
• hex key means having a rearward body coaxial of said socket means bore and a forward hex wrenching shaft extending forwardly of said socket means, said wrenching shaft being receivable in said pin component hex recess for holding said pin component against rotation during a fastener installation event, said key body having a rearward external hex surface and a rearwardly opening threaded bore;
• tubular key holder means coaxial with but rotationally independent of said socket means, at least a forward portion of said holder means being located within said socket means bore, said holder means having a forwardly opening internal hex engageable over said key body hex to rotationally lock said key means and said holder means together;
• retention means extending coaxially through said holder means but rotationally independent of said holder means, said retention means having an externally threaded forward end portion that is threadedly engageable in said threaded bore of said key means, and having limit means thereon which is interengageable with said holder means to limit forward location of said retention means in said holder means;
• said retention means being biased forwardly toward a forwardmost position of repose in said socket means, and said retention means and key means being rearwardly retractable relative to said socket means against the biasing force of said spring means during a fastener installation event as said socket means moves forwardly relative to said key means;
• and
• antirotation means connected to said drive head assembly means and operatively associated with said holder means for holding said holder means fixed against rotation relative to said assembly means;
• said key means being forwardly threadedly removable from said holder means by rotating said retention means in one direction relative to said holder means, and another said key means being threadedly replaceable in said holder means by rotating said retention means in the other direction relative to said holder means.