This range is quite expensive averaging 0.15 cents each - nuts, bolts and lock washers. Probably not recommended due to the very high unit price.
π© 5-Pack of M8x60mm Stainless Steel External Hex Expansion Bolts by Yasorn
10 Review
π© M6 1.0 Stainless Steel Flanged Hexagon Flange
8 Review
πͺ Strong and Versatile: National Hardware N222 406 Square Bolts for Secure Fastening
7 Review
POWERTEC 4 Inch 20 2 Inch QTB1005 T Slot: A Revolutionary, High-Quality Power Tool Accessory!
8 Review