The importance of maize for human, livestock and poultry regarding to use as feed or as dry feed industry. Identified physical and mechanical properties of maize grains are important to design the planter/seeder (hopper, metric device, tube), grading grains machines, storage structures and to select members and components of storage equipment. So, this study aimed to determine the maize grain physical and mechanical properties for new varieties, namely hybrid single cross Hi-Tech white and hybrid single cross 168 yellow which use as relative parameters for designing machines and all instruments deal with these new grains. The material of experiments, one hundred of maize grains were chosen at random from two maize varieties hybrid single cross Hi-Tech white and hybrid single cross 168 yellow. The mean MC was found to be 11% (w.b.) for both varieties of maize grains under tests. The results found  for maize grains of the hi--Tech and hybrid 168 maize varieties, the mean length, width, thickness, surface area, projected area, kernel volumes, arithmetic diameter, geometric mean diameter, sphericity, and aspect ratio were (10.63-10.02 mm),(10.00-8.29 mm), (5.28-4.81 mm), (211.84-169.07 mm²), (83.75-65.36 mm²), (291.6-207.96 mm³), (8.64-7.71 mm), (8.20-7.32 mm) ,(77.77-73.37 %), and (94.77-82.93 %) ,respectively. True density, bulk density, and porosity were (1.42 - 1.28 g/cm³), (0.850 - 0.775 g/cm³), and (39.89 - 39.12%) for Hi-Tech and Hybrid 168 maize varieties, respectively. Hi-Tech and Hybrid 168 maize varieties had a mean angle of repose of 24.59° and 25.90°, respectively. The mean static coefficients of friction for maize grains (Hi-Tech and Hybrid 168 maize varieties) against four different surfaces (wood, plastic, steel, and glass) were (0.44 - 0.48), (0.36 - 0.38), (0.20 - 0.24) and (0.30 - 0.34), respectively.