2Pcs Double End Threaded Stud Screw Bolts M6 to M8 304 Stainless Steel Thread Adapter for Structural Columns Fasteners: Amazon.com: Industrial & Scientific
uxcell Roll-in Spring M6 T Nut, Roll Ball Elastic Nuts for 4040 Series Aluminum Extrusion Profile Suitable for Aluminum Profile with 8Mm Groove Depth, Pack of 12: Amazon.com: Industrial & Scientific