Groove spacing is center to center of grooves.
Evergreen EG4030 V-Groove 0.75mm Spacing 1.0mm Thick Plasticard Sheet
EG4050 Evergreen V-Groove Sliding .050" Spacing (1.3mm)
EG2080 Evergreen V-Groove Sliding .080" Spacing (2.0mm)
Methanol Engine Run in Test Stand Sliding Nut Channels Stable CNC Machined
Arrma Sliding Motor Mount Plate 56 Series, Red ARA320722