a 3/8-24 unf nut and bolt (3/8 in nominal diameter, 24 threads/in) are inserted through a hole in two stacked steel plates. they are tightened so the plates are clamped together with a force of 1000 lb. the torque coefficient is 0.25. (a) what is the torque required to tighten them (in-lb)? (b) what is the resulting stress in the bolt (lb/in2)? (3 points)
