I found an old kick, and I'm cleaning it up. I see a few online have a pocket clip, and I'm assuming it attaches via this curled nut with threads in. Does
Sidekick Multi-Tool | Leatherman
Leatherman Sidekick® Multitool | Leatherman
Leatherman--Kick 2004
New Vintage Leatherman KICK Black multitool. Nylon Snap belt sheath. Collectible | eBay
Leatherman review with a twist -
Leatherman Kick with Nylon Sheath and Box (Black Oxide) 830263