A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Bill Morris
Date: 2019 Jan 31, 19:26 -0800
The Freiberger screws are M3, while the SNO-T screws are M4. The spacing is a bit difficult to measure, but is 16 mm for the Freiberger and perhaps 15 mm for the SNO-T; if you use M3 screws, there should be enough "wriggle room". The lengths of the two SNO-T screws are 15 and 6 mm. If you put the long one in the short one's hole, you may well damage the mirror, the mirror bracket or both.