FLAT WASHERS MAT: ALLOY STEEL SA 506 (1650) QTY 4000 PCS. BOLT SIZE: M10 INSIDE DIAMETER (MM): 10.3 OUTSIDE DIAMETER (MM): 20.65 THK (MM): 1.6 OVERALL HEIGHT (MM): 2 LOAD (N): 8340 FLAT WASHERS MAT: ALLOY STEEL SA 506 (1650) QTY 5000 PCS. BOLT SIZE: M20 INSIDE DIAMETER (MM): 20.599 OUTSIDE DIAMETER (MM): 44.50 THK (MM): 3.4 OVERALL HEIGHT (MM): 4.32 LOAD (N): 37808 If not available offer also alternative dimensions Ex works delivery Please indicate weight