Izumi chain link screw & square nut
So, you lost the tiny little machine screw for your Super Toughness chain?
No need to go digging around at the hardware store trying to find something that will (or probably won't) work. We've got 'em!
This will also work on Izumi V half link connectors, D.I.D. Racing Pro and HKK Vertex NJS chains.
• NJS-style bolt and nut secure attachment
• for use with 1/8" NJS chains only