PRODUCT SPECIFICATIONS Part #: 0000-121898 Fastener Type: Carriage Bolt Size Description: 7/16 -14 x 3 1/2 (FT) Diameter/Nominal Size: 7/16 Length: 3 1/2 Thread Pitch: 14 Thread Pitch Type: Coarse Thread Direction: Right Thread Coverage: Full System of Measurement: Inch Grade: 5 Material: Medium Carbon Steel Finish: Thermal Black Oxide Average Piece Weight: 0.1512400 lbs. Carriage bolts are Ideal for use in square holes in wood-to-wood and wood-to-metal fastening; bolt has a square neck that prevents it from turning once screwed in. When trying to determine the length of the item measure from just under the head of the bolt.