Roll-in T-slot Nut 7.7 x 4.0 mm, Slot 5, Self-aligning with Spring Loaded Ball, Steel

Roll-in T-slot Nut 8.0 x 4.2 mm, Slot 5, with Spring Loaded Ball, Steel / Stainless Steel

Roll-in T-slot Nut 8.0 x 4.7 mm, Slot 5, Self aligning with Spring Loaded Ball, Steel