Custom Bracket's SP-520 Lens Mount Screw for GLM Plates is a captive 1/4"-20 mounting screw for the GLM 5.5, 6.5 and 8.5 lens plates by Custom Brackets. The screw has a 3/8"-16 thread so it can remain captive in the lens plate, and the 1/4"-20 thread for is for mounting lenses that have a 1/4"-20 mounting hole. It is made from lightweight aluminum, and is turned by using a slotted screwdriver, or the built-in D-Clip.
In the Box
Custom Brackets SP-520 Lens Mount Screw for GLM Plates