COMMONLY USED WITH 15 SERIES ALUMINUM EXTRUSION PROFILES. SELF ALIGNING ROLL-IN T-NUTS ALLOWS INSTALLATION ON PROFILE WITH CLOSED ENDS. INSTALL ANYWHERE ON THE T-SLOT TRACK. NO MACHINING REQUIRED WHEN USING A T-NUT AND A BOLT TO MOUNT CORNER BRACKETS, JOINING PLATES, AND ANCHOR FASTENERS. BALL SPRING POSITIONS THE T-NUT IN THE SLOT. T-SLOTTED HARDWARE ESSENTIAL COMPATIBLE WITH 80/20 PART # 13037