Strictly contusion? Got fingers pinned by metal rack and wall while curled. Knuckles very swollen, bruised, pain. Xrays neg. 2 days ago. Bending hard.

Most likely. Swelling from a severe contusion to the fingers or hand can persist for up to 4 months. Just because x rays are negative you could have a soft tissue injury particularly to the dorsum of the fingers due to the minimal soft tissue protection. Follow up with hand surgeon.