Amazon.com: M6 M8 Square Neck Bolt Flat Head GB12 Carriage Screw Black Zinc Screws M6x30mm(8pcs) : Industrial & Scientific
Amazon.com: Flat Head Bolt
Amazon.com: 3/8-16 x 5" Carriage Bolts, Round Head, Square Neck, Stainless Steel 18-8, Full Thread, Plain Finish, Flat Poin… | Carriage bolt, Screws and bolts, Bolt
DIN603 Elevator Stainless Flat Mushroom Round Head Square Neck Carriage Titanium Bolts with Name - China Fasteners, Round Head Square Neck Carriage Bolts | Made-in-China.com
1800 pcs) 1/4"-20 X 2-1/2", Carriage Bolts, Flat Head, Square Neck, Full Thread, A307 Steel, Zinc: Amazon.com: Industrial & Scientific
Amazon.com: National Hardware N280-859 V7652 Flat Head Carriage Bolts and Nuts in Zinc plated, 12 pack,1/4" - 20 x 1-3/4" : Industrial & Scientific