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Round Head, Short Neck, Carriage Bolts

Full Thread, A307 Steel, Zinc ASME B18.5

Short square shoulder under the head designed to keep the bolt from turning when a nut is being tightened. The short neck is used in sheet metal or any thin material where the standard sized neck would stop the nut from being tightened completely or obstruct the object. Meets ASME B18.5 specifications and made from A307 carbon steel with a Zinc plated finish for mild corrosion resistance.
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BO012-51618X34-002000 Bolts Carriage Bolts Round Head, Short Square Neck BO012-3816X34-001300 Bolts Carriage Bolts Round Head, Short Square Neck


Round Head Short Neck Carriage Bolts by Aspen Fasteners

We carry many sizes and styles not listed on our website.

If you should happen to be looking for carriage bolts or other fasteners that are currently not listed as stock items on Aspen Fasteners, please contact us and we will do our best to find the parts for you through our vast network of vendors. All of the square head battery bolts are standard stock items, and available for immediate same day free shipping.

All items are available in bulk quantities, but if smaller quantities are preferred, we would like to hear from you as we are often able to offer the same parts in smaller package quantities. If you require a quote for a specific fastener or square head battery bolts listed or not, please call us at 1-800-479-0056 or email us at and one of our knowledgeable sales staff will help you with your needs.

The price of any fastener listed on the site includes shipping to your destination. If you have any special shipping requirements (eg expedited/next day delivery), please let us know at the time of order placement and we will make the necessary arrangements. Discounts are available for larger quantity orders. Major credit cards are accepted.