Lots of nuts and bolts in this challenge so need to excel to make a mark. This image might have but lacks a focal point. Wahsed out faces of nuts seem to contradict the one feature that makes this a good topic for photopgraphy - the fine machining.
I like the idea and I see what you were trying to do but the composition is a bit too uncomfortable for my liking and the DoF too shallow. The foreground nuts are too distracting. Might have benefitted from a wider angle to increase the perspective.
Love the colours with the green/blue bits.