KMT 4 Precision lock nuts with locking pin detail Specifications: Material : 52100 Chrome Steel Weight : 0.11 Kg   Main Dimensions: Thread (G) : M20X1 Diameter side face opposite to bearing (d1) : 32 mm Outside diameter (d2) : 40 mm Outside diameter locating side face (d3±0.30) : 35 mm Inner diameter locating side face (d4±0.30) : 21 mm Width (B) : 18 mm Width locating slot (b) : 5 mm Depth locating slot (h) : 2 mm Width flat spanner (M 0/-0.50) : 36 mm Set / Locking screw size (A) : M6 L : 2 mm C : 36 mm R1 : 0.5 mm Sd : 0.04 mm