Amazon.com: The Bed Slats Company M6 x 14mm Cross Dowels Barrel Nuts with 130mm Furniture Connecting Bolts for Bunk Beds Cots - Set of 8 : Home & Kitchen
M6 x 80mm Furniture Bolts Nut Set Hex Socket Screw with Barrel Nuts 12 Sets - M6 x 80mm 10 Sets - - 35930227
M6x60mm Furniture Bolt Nut Set Hex Socket Screw with Barrel Nuts 5Sets - Bronze - M6x60mm,5 Sets - On Sale - Bed Bath & Beyond - 26406980