5/16" x 1" Carriage Bolt, 18-8 SS

5/16"-18 Carriage Bolts have a 5/16" square shoulder below a 11/16" diameter round head. The fastener length is measured under the head including the square shoulder. Carriage Bolts up 6" long are typically fully threaded. Carriage Bolts longer than 6" usually have 6" of thread. 18-8 Stainless Steel for general construction, industrial and marine applications.