- Dec 30, 1999
- 6,324
- 10
- 81
You would need to tell us what type of rack it is. Cage nut / direct mount....
10-32 x .75" is the most common for threaded hole racks.
these look like standard
http://www.apc.com/products/resource/include/techspec_index.cfm?base_sku=AR8400