Self-clinching nuts according to drawing Material: steel Material execution: case-hardened Surface: zinc plated blue Hardness: 380-500 HV We require M3 and M4 with the above specification. Please prepare prices according to requested quantities: M3: 60 pcs, 120pcs, 300 pcs, 720 pcs M4: 20 pcs, 40 pcs, 100 pcs, 240 pcs