Amazon.com: Pro Bamboo Kitchen 8 Sets Stainless Steel Carriage Bolt 5/16"-18 x 5/8 Carriage Bolts with 5/16 Nuts and Washers Self Locking Nonskid Nylon Lock Nut : Industrial & Scientific
Amazon.com: Hakkin 120PCS 5/16-18 Hex Bolts and Nuts Kit, Stainless Steel 5/ 16" Nuts and Bolts Assortment Kit, Flat & Lock Spring Washers Set Screw Assortment Kit, Machine Screws Set with Storage Case :