uxcell M5 Female Thread Roll-in Ball Spring T Slot Nut 20pcs Silver Tone Product Name: Ball Spring T Slot Nut; Material: Metal Weight: 45g; Package Content: 20 x Ball Spring T Slot Nut Overall Size: 13.5 x 8 x 5.5mm/0.53" x 0.3" x 0.22"(L*W*H); Main Color: Silver Tone Thread Size: M5 Fit for: 20 Series Metrics