Amazon.com: Boeray 50pcs M5 Slide in T Nut Tee Sliding Nut Nut for Aluminum Extrusion with Profile 2020 Sereis Slot 6mm : Industrial & Scientific
KOOTANS 100pcs 2020 Series Sliding T Nuts Metric M3 Thread Slide in Hammer Head T-Nut for Standard 6mm T-Slot Aluminum Extrusion Profile: Amazon.com: Industrial & Scientific
Bach Slide Stop Nut Tpt. SP – Thomann Italia
BIS Strut Slide Nut (hdg) - Walraven International