Eye bolt assembly Home » General Machining » Eye bolt assembly Product Summary The above picture shows an eyebolt assembly that we had worked on. Specifications Materials: The material came to JK Manufacturing as a forged piece of carbon steel Size: The overall length of the assembly is 9' from eye center to eye center. Thread: The bolts diameter is 6 1/2" and have 1 and 1 1/3 ACME threads. Click on a picture below for better detail. A new window will pop up. Close window to return to this page.