1/4"-20 x 3/4" SAE J429 Grade 5 Round Head Zinc Finish Full Thread Carriage Bolt / THREAD CLASS: 2A THREAD DIRECTION: RIGHT-HAND THREAD LENGTH: 0.75 INCHES NOMINAL FASTENER LENGTH: 0.75 INCHES NOMINAL HEAD STYLE: C26 DEE CHAMFER HEAD DIAMETER: 0.536 INCHES MINIMUM AND 0.594 INCHES MAXIMUM HEAD HEIGHT: 0.125 INCHES MINIMUM AND 0.145 INCHES MAXIMUM DISTANCE FROM CENTERLINE TO FLAT: 0.281 INCHES MINIMUM AND 0.297 INCHES MAXIMUM END ITEM IDENTIFICATION: 4940015910265 NOMINAL THREAD DIAMETER: 0.250 INCHES THREAD QUANTITY PER INCH: 20 PART NAME ASSIGNED BY CONTROLLING AGENCY: CARRIAGE, BOLT MATERIAL: STEEL OVERALL THREAD SERIES DESIGNATOR: UNC