503.
American National Center Gage, also known as U.S. Standard Center Gag.
Grinding and setting screw cutting tools are two applications for this product.
There are scales with 14ths and 20ths graduation marks on one side and 24ths and 32nds marks on the other side.
When determining the number of threads per inch, scales are used.
In addition, the gauge includes a table of double thread depths for selecting the appropriate size of tap drills.
Made of hardened spring tempered steel with a protective satin chrome finish, this tool is durable and long-lasting.
Precision grinding is used to create all gaging surfaces.
Made in the United States of Americ.
Almost as expected, I had to use my reading glasses to read the text, but it was easy and straightforward to use.
