Product Description

5146 Surface Mount Adapter

Flangeless Instrument Mount

The 5146 adapter provides a standard 3½”-8 external thread for mounting various bases or other adapters, including standard surveying or optical alignment instruments. It has three mounting holes for fastening the ring to virtually any flat surface.

You may also be interested in similar products such as the 235-6 (will accommodate an 800 precision lift) or the 235-18.

Be sure to have a look at all of our instrument adapters for 3D or alignment instruments.


Bolt hole pattern:
Three equally spaced holes on a 2.970″ diameter bolt circle. Holes are 0.199″ (5.1mm) diameter, and are counterbored 0.344″ (8.7mm) diameter to a depth of 0.187″ (4.7mm).
External thread: 3½”-8
Approx. weight: ¼ lb.


May Be Used With

Fits onto any customer-supplied surface with a matching bolt-hole pattern
Accepts any product having an internal 3½”-8 thread



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