Roofnest Flock T-Slot Nuts Does anyone know what T

T-Slot Nut, 5 pcs Black Oxide Finish T Slot Nuts M810 Threads Fit m8 t slot nuts These T-slot nuts fit directly into the aluminium slot in any profile Fitted with a ball bearing which makes it easier to install the T-nut in vertical m88 slot I am buying a used CSL DD wheelbase I am not sure if the T-Slot nuts will be included I may need to buy some T-Slot nuts to mount the

m8bet slot T-Slot Nut for construction profiles