A flat head bolt with a bearing surface that is countersunk to a 150 degree angle. Although flat, the head has a measurable side height causing it to protrude above its mating surface when it is completely tightened. Directly below the head is a square neck and a threaded section that has a unified thread pitch.
The square neck design keeps the bolt from turning as a nut is tightened. The flat head feature gives a lower profile on the front or top side of the fastening than a round head carriage bolt. Designed specifically, but not exclusively for the garage door industry.
![Carriage Bolts Data Sheet Carriage Bolts Data Sheet](https://cdn10.bigcommerce.com/s-gdy1ehz/product_images/uploaded_images/data-sheet.png)
All carriage are made to ASME standard specs. Click on the Data Sheet Icon for product drawings, dimensions, performance and mechanical data.
Needing a custom carriage bolt? AFT offers in-house plating and customization including: Xylan, Black Oxide, drilling, cutting, nylon patch and more. Please contact us for a quote.