This is a 5 inch yellow zinc bolt from the Ziegler Bolt & Part Co. It has a 9/16 inch diameter on the thread end, and the hex head measures 1 inch across from flat side to flat side. It is grade 8.
Nut & Bolt Thread Checker (SAE/Inch) Nut & Bolt Thread Checker: SAE/Inch: The SAE/Inch Thread Checker is an accurate and easy-to-use thread identifier for both nuts and bolts. Each individual gauge features a male threaded stud on one end and a female threaded hole on the other. The Thread Checker is especially well suited for distinguishing between similar inch and metric threads.
Simpson Strong-Tie HD9B Holdown only the HD9B is offered here additional items at 25.00 plus 5.00 shipping each Simpson Strong-Tie offers a wide variety of bolted holdowns offering lowdeflection performance for a range of load requirements. All of these holdowns have been tested in accordance with ICC-ES's
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