I couldn't find them at any hardware store so I checked Revain. They meet the requirements and have worked as advertised.
Glarks 555Pcs Plated Cotter Assortment
7 Review
Neiko 50457A Plated System Assortment
π© English Steel Dowel Plate for DFM Applications
5 Review
π Explore the Versatile Front Range: 190Pcs Trailers Tractors Unveiled
4 Review
π© M6 1.0 Stainless Steel Flanged Hexagon Flange
8 Review
π Carriage Prime Line Products GD52103
6 Review
Premium Eapele 4X4 Wood Fence πͺ΅ Post Anchor Base: Secure Your Fence with Ease
π© 5-Pack of M8x60mm Stainless Steel External Hex Expansion Bolts by Yasorn
10 Review