Adafruit 1156 Aluminium Extrusion Oval T-Nut for 20x20 - M4 Thread
An essential for working with slotted Aluminium extrusion, these slim metal nuts slide into the ends of the extrusion. The oval shape means that as they screwed-into the nut jams against the slot. This is for our 20x20mm slotted extrusion, not "OpenBeam" 15x15mm
This product comes as single T-nut, with M4 threads.