fixed part name for screw

schpin_koke/src/scad/metric.scad

@@ -35,7 +35,7 @@ M2N = M2gen(0, M_NUT, head_h = 0, head_d = 0, groove_offset = 0,
 	    part_name = "M2 nut");
 
 M3L16C = M3gen(16, M_COLUMN, head_h = 3, head_d = 5.22, groove_offset = 1,
-	      part_name = "Cylinder M3x8 screw");
+	      part_name = "Cylinder M3x16 screw");
 M3L8C = M3gen(8, M_COLUMN, head_h = 3, head_d = 5.22, groove_offset = 1,
 	      part_name = "Cylinder M3x8 screw");
 M3L5C = M3gen(5, M_COLUMN, head_h = 3, head_d = 5.22, groove_offset = 1,