5/16-18 Carriage Bolts Round Head Square Neck Coach Screws 

A carriage bolt, coach bolt or round head square neckbolt is used through iron strengthening plates on either side of a wooden beam.It is commonplace though to use them on bare timber, the squared section givingenough grip to prevent rotation. Carriage bolts are extensively used insecurity fixings where the bolt must only be removable from one side. Thesmooth domed head and square neck below prevent the carriage bolt from beingunlocked from the insecure side.

General Product Information

• Head Style : Round
• Thread : 5/16-18
• Length : Select Length In Drop Down
• Quantity of Fasteners in Package : Select Package Quantity In Drop Down

Detailed Product Information:

• Head Diameter : Max 0.719 - Min 0.688
• Square Neck Width : Max 0.324 - Min 0.307
• Square Neck Height : Max 0.187 - Min 0.156
• Thread Diameter : 0.3125
• Threads Per Inch (TPI) : 18
• Coarse or Fine Thread : Coarse
• Thread Coverage : Select Length To View