Gerber AR router material holder

[Kottwitz-Graphics]

I have an older Gerber AR router, and I am in need of the material holders. What they are is an aluminium slider with 1/4" - 20 threaded hole that fit into the T-track on the table.

I can't for the life of me remember what they are called, but I seem to remember that they are available from Macmaster-Carr...

Any help is appreciated.

 

[signage]

picture of one would be helpful.

 

[mpn]

Steelex plus or shop fox hold down clamps. Hold Down Clamp for T-Slot Track | Grizzly Industrial

 

[Kottwitz-Graphics]

Thanks guys. It came to me early this morning.

T slot nuts TE-CO T-Slot Nut,1018 Steel,Base 1-1/8in - 33MP93|41412T - Grainger