M6 Roll Ball Elastic Nuts for 4040 Series Aluminum Extrusion Profile for 8mm T Slot 10 Pcs

1.Made of carbon steel nickel-plated. 2.M6 Thread. 3.Suitable for standard 40mmx40mm aluminum profile extrusion slot. 4.Easy to be roll into T slot of aluminum profile. 5.Could be used together with T screw/hex screw