I lost one and couldn't find a 5/16" (or 8mm) replacement. It appears that 1/4" (6mm) quick release pins are much more common. I bought 2 packs to have spares in case I lose another one. They fit perfectly and should last forever if not lost.
Innovative Components AI1 2T1 5 B TR6 Included
8 Review
Fluted Beveled Hardwood π© Fasteners and Pins with Wooden Material
8 Review
π οΈ Hilitchi Beveled Insertion Straight Furniture Pins: Effortless Assembly and Sturdy Support
9 Review
Enhanced Performance with POWERTEC Drilling Cobalt Collar 8 Inch
8 Review
POWERTEC 4 Inch 20 2 Inch QTB1005 T Slot: A Revolutionary, High-Quality Power Tool Accessory!
8 Review
π© Hard-to-Find Quick Fastener 014973253790 - 4 Piece Set
7 Review
π Carriage Prime Line Products GD52103
6 Review
πͺ Strong and Versatile: National Hardware N222 406 Square Bolts for Secure Fastening
7 Review