If the overall length of the base is 2" (51 mm) or less, the base will be drilled and tapped all the way through. If over 2" (51 mm), the base will be drilled and tapped at a depth of 1" (25.4 mm) on each end.
The thread sizes for Custom Caps and Bases are:
For less than 3/4" (19 mm) diameter, drill and tap for 10-24 screw thread.
For 3/4" (19 mm) to less than 1-1/4" (32 mm) diameter or square, drill and tap for 1/4-20 screw thread.
For 1-1/4" (32 mm) to less than 1-1/2" (38 mm) diameter or square, drill and tap for 5/16-18 screw thread.
For 1-1/2" (38 mm) diameter or greater, drill and tap for 3/8-16 screw thread.
CRL Standoff Systems offer a complete range of mounting accessories that you can order in any quantity necessary for your project. For installation techniques or design assistance using CRL Standoffs, contact the CRL Technical Sales Department.