Stainless steel pin that holds the REV2 Lite tether. These should be replaced if you are replacing your tether due to an impact or accident.
Use 4MM or 5/32" allen key to remove/install. Do not overtighten. Finger tight is adequate.
If you have had an impact or accident, it is recommended you replace your tether, pins, and tether buckles if there is any distortion, bending, or flaw visible. If you are in doubt, you can send your HNR to NecksGen for a no cost inspection at any time.